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Патент USA US3092639

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United States Patent 0 Hce
$092,629
Patented June 4, 1963
1
2
SPIRQLACTONES
3,092,629
Albert Bowers and Pierre Crabbe, Mexico City, Mexico,
01 I
assignors, by mesne assignments, to Syntex Corpora-
tion, a corporation of Panama
No Drawing. Filed Jan. 17, 1962, Ser. No. 166,949
12 Claims. (Cl. 260—239.57)
"
F
\F
OH
/\ Imaze-o0 on
x F
‘F
The present invention relates to novel cyclopentano
phenanthrene derivatives and to a process for the produc
tion thereof.
More particularly the present invention relates to 16,16
di?uoro-17-(y-spirolactone) derivatives of the androstane
series and to novel intermediates in the production thereof.
The novel compounds of the present invention which
are potent diuretic and aldosterone blocking agents, having
also cholesterol lowering and anti-estrogenic properties are
In
represented by the following formulas:
0=
1 ‘1
0
l
R0
1 VI
01 I
/\
-
In the above formulas Z represents a double bond or a
saturated linkage between C-5 and C-6; Y represents a
double bond or a saturated linkage between 0-4 and C-5;
R represents hydrogen or a hydrocarbon carboxylic acyl
group of less than 12 carbon atoms and R1 represents
a=
§§1RRQ§I¥$£$F
VII
the acetate, propionate, enanthate, benzoate, trimethyl- 55 I
1X; X=keto
V111
acetate, t-butylacetate, phenoxyacetate, cyclopentylpropi-
X: X=hYdr°xY
I
F
hydrogen, methyl or formyl.
The acyl group is derived from hydrocarbon carboxylic
acids containing less than 12 carbon atoms which may be
saturated or unsaturated, of straight, branched, cyclic or
cyclic-aliphatic chain, aromatic and may be substituted by
functional groups such as hydroxy, alkoxy containing up
to 5 carbon atoms, acyloxy containing up to 12 carbon
atoms, nitro, amino or halogen. Typical ester groups are
011E116, ami?oac?tate and ?-chlof0PT0Pi0I_1aYe- _
The novel compounds of the present invention are prepared by the process exempli?ed as follows:
on
F
/\
CECE
A5-androsten-3?-ol-17-one, preferably the acetate is treated
with ethyl formate in the presence of an alkali metal hy
dride such as sodium hydride and the formed sodium salt
is hydrolyzed in an acid medium to give the corresponding
‘F
/
/
___>
AC0
I_-- :
In the above formulas R2 represents hydrogen or methyl
and Ac represents the acetyl gmup; and Y and Z have the
same meaning as de?ned above.
60
In practicing the process outlined above, an ester of
65 16-hydroxymethylene derivative, which upon treatment
with perchloryl ?uoride, in the presence of an alkali metal
lower alkoxide, such as potassium ter-butoxide, affords the
HO
corresponding 16,16-di?uoro derivative (I). This com
II
70 pound is treated with acetylene in the presence of an alkali
metal lower alkoxide such as potassium ter-amyl oxide,
thus giving the 16,16-di?uoroe17a-ethynyl-A5-androstene
3,092,629
. I 3
ride-hexane gave 16-hydroxymethylene-A5-androsten-3?~
3,3,17,3-diol (II) which upon reaction with methyl magne
ol-17-one-3-acetate.
sium halide, as for example the bromide, and carbon
'
Into a mixture of 3 g. of the latter compound, 100 cc‘.
diom'de yields the corresponding 17a-(2'-carboxyethynyl)
derivative (III). Treatment of this latter acid with hydro
gen in the presence of pyridine and a suitable catalyst
of terbutanol and 40 g. of potassium ter-butoxide, there‘;
as methanol, yields the respective saturated lactone
(V: Z=double bond). Oxidation of this compound under
Recrystallization from acetone-hexane yielded 16,16-di
was passed a current of perchloryl ?uoride for 5 hours
at 35° C. The reaction vessel was then closed and the
such as 5% palladium on calcium carbonate leads to the
mixture let stand overnight at room temperature. Water
formation of the 16,16-di?uoro-17a-(2'-carboxyvinyl)
was added and the product extracted with ethyl acetate.
A5-androstene-3?,1713-diol-lactone (IV) which on further
The organic layer was successively washed with an aque
hydrogenation'in the presence of a more active catalyst
ous potassium carbonate solution, water to neutral, dried
10
such as 5% palladium on carbon in a suitable solvent such
over anhydrous sodium sulfate and evaporated to dryness.
?uoro-A5-androsten-3?-ol-17-one-3-acetate.
Oppenauer conditions yields the corresponding 3-keto-A4
Example II
androstene saturated lactone derivative (VI: Y=double
bond). Hydrogenation of the above mentioned 35
A solution of 1 g. of the product of the preceding ex
ample in 30 cc. of anhydrous benzene was added, under
nitrogen, to a solution prepared by dissolving 1.4 g. of
potassium in 30 cc. of t-amyl alcohol. A slow current
hydroxy - A5 - androsten - 17 - spirolactone (V: Z=double
bond) in the presence of a very active catalyst such as
platinum oxide affords the corresponding saturated com
pound 16,16 - difluoro-l7u-(2’-carboxyethyl)-androstane
3,9,17?-diol-laotone (V: Z=saturated linkage) which upon
oxidation, preferably under Oppenauer conditions, yields
the respective 3'ketone (VI: Y=saturated linkage).
20
of puri?ed acetylene was passed through the solution for
40 hours, whereupon the solution was diluted with water
and extracted with benzene. The organic extracts were
then washed to neutral and dried over anhydrous sodium
This latter compound is hydrolyzed in a basic medium,
sulfate. Evaporation of the solvent and chromatography
such as sodium hydroxide solution, to give the sodium
25 of the residue on 70 g. of alkaline alumina gave in the
salt of the acid resulting from the opening of the lactone
hexane-benzene (2:3) fractions a product, which upon
ring. Treatment of this salt with ethyl formate in the
recrystallization from acetone-hexane afforded the pure
presence of an alkali metal hydride such as sodium hy
16,1?-di?uoro-17u-ethynyl-A5-androstene-3p,17,3-diol.
dride, followed by acid hydrolysis of the double- sodium
salt gives 2-hydroxymethylene-16,16-di?uoro-17a-(2'-car
boxyethyl)-androstan-17/3-ol-3-one-lactone (VII; R2=hy
Exam'ple III
30
drogen). Methylation of the Z-hydroxymethylene group
of the latter compound with a methylating agent, as for
example diazom'ethane yields the corresponding Z-meth
A solution of 1 g. of the latter steroid in 10 cc. ofv an
hydrous tetrahydrofuran was added to a re?uxing solu
tion of 6 cc. of 3 M. methyl magnesium bromide in 15 cc.
of tetrahydrofuran. The resulting suspension was stirred
and re?uxed for 24 hours. A slight positive pressure of
oxymethylene derivative (VII: R2=methyl) which upon
reduction of the 3-keto group followed by acid hydrolysis
of the resulting 318-hydroxy compound furnishes the corre
carbon dioxide was then maintained over the stirred mix
ture, for approximately 24 hours. The mixture was there
sponding 2-forrny-l-16,16-di?uoro-17a-(2’-carboxyethyl)
after poured into ice cold 0.2 M. sulfuric acid and most
of the solvent removed by vacuum distillation. The crude
nz-androsten-17,8-ol-lactone
(VIII).
The aforementioned 2-hydroxyniethylene' compound 40 precipitated product was ?ltered off, washed with water to
(VII: R2=H), upon hydrogenation in a suitable solvent
neutral and dried. Recrystallization from acetone-hexane
such as methanol in the presence of a catalyst such as 10%
afforded 16,16-di?uoro-17a-carboxyethynyl-Aiandrostene
35,17?-dio1.
palladium on charcoal, followed by treatment with an
alkali metal hydroxide, in order to transform totally the
Example IV
formed 2-methyl compound into the Zoe-methyl isomer,
and subsequent neutralization with an acid, yields 20!. 45
methyl - 16,16 - di?uoro-17a-(2'-carboxyethy1)-androstan
17p-ol-3-one-laotone (IX). Reduction of the 3-keto group
of the preceding compound affords the respective 313-hy
A solution of l g. of the precedingsteroid in 40 cc. of
dioxane and 4 cc. of pyridine was hydrogenated at 25 ° C.
and 570 mm. in the presence of 400 mg. of pre-hydro
genated 5% palladium calcium carbonate catalyst.
When 1.1 molar equivalent of hydrogen had been ab
7
Upon treatment of the aforementioned 3/3-hydroxy 50 sorbed, the reaction was stopped, the catalyst separated
by ?ltration through celite, washed with ethyl acetate and
iandrostane derivatives (V: Z=saturated bond and X) with
the combined solutions evaporated ~to dryness in vacuo,
tosyl chloride in pyridine and subsequent reaction of the
droxy derivative (X).
formed 3B-tosylates with sodium acetate in acetic acid
furnish the corresponding A2-androstene compounds (XI,
XII).
The 3B-hydroxy-17-spirolactones described above are
conventionally acylated in pyridine with an acylat-in g agent,
yielding the crude lactone. This crude product was dis
solved in ethyl acetate, the organic solution washed with
55 dilute hydrochloric acid and water to neutral, dried and
evaporated to dryness.
as for example the anhydride of a hydrocarbon carboxylic
acid of the type described hereinbefore, to yield the corre
60
sponding 3/i-acylates.
The following speci?c examples serve to illustrate but
are not intended to limit the scope'of the present invention:
Example I
Recrystallization from acetone
gave 16,16-di?uoro-17a-(2'-carboxyvinyl)-A5-androstene
3 )3, l7B-diol-lactone.
Example V
A suspension of 0.5 g. of 5% palladium on carbon cata
lyst in 50 cc. of methanol was hydrogenated for 30 min
utes. A solution of 2 g. of the preceding lactone in 200
cc. of methanol was added to the catalyst and stirred under
a hydrogen atmosphere until the uptake of hydrogen
To a solution of 3 g. of A5-androsten-3B-ol-17-one 65 ceased. After removal of the catalyst by ?ltration the
acetate in 60 cc. of anhydrous ‘benzene was added 3 cc.
solution was evaporated and the crude residue was puri?ed
of ethyl formate and 1.3 g. of sodium hydride, suspended
by crystallization from methylene chloride-hexane, thus
in mineral oil while cooling and stirring under an atmos
giving
16,16 - difluoro - 17oz - (2'-carboxyethyl)-A5-andro
phere of nitrogen. The mixture was stirred for 24 hours
at room temperature, hexane was added until complete 70 stem-3B,l7?-diol—lactone.
precipitation, the solid was collected and dried under
Example VI
vacuum. The crude material was suspended in aqueous
A solution of l g. of the latter lactone in 80 cc. of
hydrochloric acid and stirred at room temperature for
toluene and 20 cc. of cyclohexanone was dried by dis
half-hour. The precipitate was ‘collected, washed with
water and dried. Recrystallization from methylene chlo 75 tilling off 10 cc. of the solvent. A solution of 1 g. of
3,092,629
5
6
aluminum isopropoxide dissolved in 7 cc. of anhydrous
acetate, the extract was washed with water, dried and
toluene was then added and the mixture was re?uxed for
45 minutes; 4 cc. of acetic acid was added and the sol
vents removed by steam distillation. The product was
evaporated. The solid residue was puri?ed by crystalli
zation ‘from acetone-hexane to give 2-formyl-16,l6-di—
?uoro-17a-(2’ - carboxyethyl) - A2 - androsten - 17B - ol
extracted several times with ethyl acetate and the organic
extracts washed with 15% hydrochloric acid solution,
water, 10% sodium carbonate solution and Water until
neutral, dried over anhydrous sodium sulfate and evapo
rated to dryness. Crystallization from acetone-hexane
lactone.
catalyst in a hydrogen atmosphere until the gas uptake
at room temperature; acetic acid was added to neutrality,
Example XIII
7 g. of 2-hydroxymethylene-16,16-di?uoro-17a-(2'-car
boxyethyl)~androstan-17/3-ol-3-one-lactone obtained ac~
cording to Example X was dissolved in 300 cc. of meth
afforded 16,16 - di?uoro-l7a-(2'-carboxyethyl)-A4-andro 10
anol and mixed with 2.5% of a 10% palladium on char
sten-l7B-ol-3-one-lactone.
coal catalyst. The mixture was hydrogenated at approxi
Example VII
mately 25° C. at atmospheric pressure until the absorp—
tion of hydrogen ceased. The catalyst was removed by
A solution of 2.0 g. of 16,116-di?uoro-17a-(2'-carboxy
ethyl)-A5-androstene-3/8,17(3-diol-lactone in 100 cc. of 15 ?ltration, 1 g. of potassium hydroxide in 6 cc. of water
was added to the solution which was then kept for 1 hour
ethyl acetate was shaken with 100 mg. of platinum oxide
the solvent was completely removed under reduced pres
sure, water was added to the residue and the product
and the ?ltrate evaporated to dryness. Recrystallization
from acetone-hexane afforded 16,16-di?uoro-17a-(2'-car 20 was extracted with methylene dichloride. The extract was
washed with water, dried over anhydrous sodium sulfate
boxyethyl) androstane-3,8,17p-diol-lactone.
and evaporated to dryness under vacuum. Crystalliza
corresponded to one mol.
The catalyst was ?ltered off
Example VIII
tion from acetone-hexane afforded 2a-methyl-l6,l6-di
?uoro - 17a - (2'-carboxyethyl)-androstan-17?-ol-3-one
Upon treatment of the last named steroid by the pro
cedure described in Example VT, there was obtained 25 lactone.
Example XIV
16,16-di?uoro=17a-(2'-carboxyethyl)-androstan - 17 f3 - ol
3-one-lactone.
A solution of 6 g. of sodium borohydride in 90 cc. of
methanol was added with stirring to a solution of 6 g. of
the latter steroid in 140 cc. of tetrahydrofuran. The mix
A solution of 3 g. of the latter product in 50 cc. of
methanol was re?uxed for 3 hours with 1.5 g. of sodium 30 ture was kept at room temperature overnight, the excess
reagent was decomposed by addition of acetic acid, the
hydroxide dissolved in 10 cc. of water. The resulting
‘resulting solution concentrated to small volume in vacuo
mixture was then concentrated to a small volume under
and diluted with water. The product was extracted with
vacuum, ice-water was added, the precipitate ?ltered o?,
ethyl acetate, the extract washed with water, dried and
washed with ice-cold water and dried under vacuum thus
Example IX
yielding the sodium salt of the l6,l6-di?uoro-17a-(2’-car 35 evaporated. Crystallization of the solid from acetone
hexane gave Zwmethyl-l6,l6-di?uoro-17a-(2’-carboxy
boxyethyl) -androstan- 1 75-01-3 -o11e.
ethyl) -androstan-3?,17B-diol-laotone.
Example X
Example XV
To a suspension of 3 g. of the above sodium salt in 60
cc. of anhydrous benzene was added 3 cc. of ethyl for
mate, 20 cc. of tetrahydrofuran and 1.3 g. of sodium hy
dride, suspended in mineral oil while cooling and stir
ring under an atmosphere of nitrogen. The mixture was
A solution of 5 g. of the last named compound ‘in 25
cc. of pyridine was cooled to 0” C. Under stirring, there
was added 1.3 g. of tosyl chloride, the mixture was kept
for 16 hours at 0° C., diluted with 100 cc. of chloro
stirred for 24 hours at room temperature, hexane was
form, washed with dilute hydrochloric acid, Water, aque
added until complete precipitation and the solid was col 45 ous sodium bicarbonate solution and again with Water,
dried over anhydrous sodium sulfate and then evaporated
lected and dried under vacuum. The crude material was
to dryness under reduced pressure. Thus there was ob
suspended in aqueous hydrochloric acid and stirred at
tained the crude 3;8-tosylate of the starting material.
room temperature for half an hour. The precipitate was
The total crude compound was re?uxed with 5 g. of
collected, washed with Water and dried. Recrystalliza
anhydrous sodium acetate and 60 cc. of glacial acetic acid
tion from ethylene chloride-hexane gave Z-hydroxymeth
during 5 hours. Chloroform and water were added.
The aqueous layer was extracted several times with
chloroform and the combined organic extracts were
ylene-16,l6-di?uoro - 17a - (2'-carboxyethyl)-androsta_n
l7?-ol-3-one-lactone.
Example XI
washed with concentrated sodium bicarbonate solution,
To a solution of 3 g. of the latter Z-hydroxymethylene 55 then with water, dried over sodium sulfate and evapo
compound in 50 cc. of methylene chloride were added an
rated to dryness. Chromatography and recrystallization
excess of diazomethane in ether (‘Obtained from nitroso
of the solid fractions from acetone-hexane afforded
methylurea) and a few drops of methanol. The reaction
2-methyl-l6,l6-di?uoro-l7a-(2’-carboxyethyl) - A2 - an
mixture was kept at room temperature for 18 hours. The
drosten- 17 ,8-ol~lactone.
excess reagent was decomposed with acetic acid. The
Following the above procedures, there was treated 16,
60
resulting mixture was poured into water, the organic
layer washed to neutral and evaporated to dryness. Re
16-di?uoro-l7a-(2'-carboxyethyl) - androstane - 313,175
diol-lactone, thus yielding 16,16-di?uoro-17a-(2’-car
crystallization from acetone-hexane afforded 2-methoxy
boxyethyl) -A2-androsten-1713-ol-lactone.
methylene - 16,16-di?uoro-l7a-(2’-carboxyethyl) - andro
stan-l7B-ol-3-one-lactone.
Example XVI
65
Example XII
A solution of 1 g. of sodium borohydride in 3 cc. of
Water was added to an ice-cooled solution of l g. of the
A mixture of 1 g. of 16,16—dl?u0I'O~17a-(2'-C3Ib0XY
ethyl)-A5-androstene-3,8,l7?-diol-lactone, 4 cc. of pyridine
and 2 cc. of acetic anhydride was kept at room tempera
ture overnight, poured into ice water, the formed precipi
latter steroid in 120 cc. of methanol and the mixture was
tate was ?ltered, washed with water and dried. Crystal
allowed to stand for 16 hours at room temperature. 70 lization from acetone-hexane gave the 3-ac'etate of the
Then it was cautiously acidi?ed with hydrochloric acid
and further stirred for thirty minutes.
The resulting
mixture was concentrated to small volume in vacuo and
diluted with water. The product was extracted with ethyl 75
starting compound.
By the same technique, there was treated 16,16-di?uoro
l7a-(2’-carboxyethyl) - androstane - 3,8,175 - diol-lactone,
thus yielding the, corresponding 3Jacetate thereof.
3,092,629
8
7
gen and a hydrocarbon carboxylic acyl group of less than
Example XVII
L2 carbon atoms.
Following the technique described in the foregoing ex
ample but ‘substituting acetic anhydride by propionic :an
2. 16,16-di?uoro - 17a -~(2'-carboxyethy1) - A5 ~andro
stene-3B,17B-dio1-1actone.
hydride, caproic anhydride, cyclopentylpropionic anhy
3. 16,16-di?uoro - 17a - (2'-ca1'boxyethy1)-androstane
dride and lbenzoyl chloride; there were obtained the
3 l8, l7a-dio1-1actone.
3-propionates, 3-caproates, 3-cyclopentylpropionates Iand
4. 16,16-di?uoro-17a-(2' - carboxyethyl)-A4-androsten—
:3-benzoates of the starting compounds of .the said ex
ample.
We ‘claim:
1. A compound of the following formula
17B~o1-3-'0ne-1actone.
S. 16,16-di?uOrO-17a-‘(2' - calrboxyethyl-androstan-17B
10 o1-3-one-1actone.
6. 2a-methyl-16,16-di?uoro - 17cc - (2’ - carboxyethyD
androst-an-17?-ol-3-one-lactone.
7. 2a-methy-l-16,16-di?uoro - 17a. - (2’ - canboxyethyn
andIostane-Ia‘ B, l7?ddiol-lact-one.
15
8. 2-methy1-16,16-di?uoro - 17a - (2'-carb0xyethyl)-A2
:androsten-l7,8-01-1actone.
9. vZ-fonnyl-16,16-di?ucvro - 17a - (ZLGEI‘bOXYBthYD-AL
androsten-UB-ol-lactone.
10. 16,16-di?uoro 417a - (2' - carboXyethyD-AZ-andro
sten-17B-o1-lactone.
11. 2_hydroxymethylene-16,16-di?uoro - 17oz - (QX-car
boxyethyl) -androstan- 17?-o1-3-one-1actone.
v 12. 2-methoxymethylene-16,16-di?uoro - 17a - (Z’ecar
' boxyethyl) -a.ndro stan- 1713-01-3 -one-1actone.
‘wherein Z is selected from the group consisting of a
double bond and a saturated linkage between 0-5 and 25
No references cited.
C-6 vand R is a member of the group consisting of hydro
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