Патент USA US3073836код для вставки
"re 3,73,3Zh Patented Jan. 15, 1%63 1 3,073,826 S-PYRROLIDYLMETHYL=4-QUINAZOLONES Homer C. Scarborough, Evansville, Ind., assignor to Mead Johnson & Company, Evansville, Ind., a corporation of Indiana No Drawing. Filed Oct. 20, 1960, Ser. No. 63,734 11 Claims. (Cl. Mil-256.4) This invention relates to new compositions of matter and, more particularly, to 3-pyrrolidylmethyl-4-quinazo The above equation shows the reaction of acetanthranil 10 with l-lower alkyl-3-pyrrolidylmethylamine to form 2 substituted-3-(1-lower alkyl-3-pyrrolidylmethyl ) -4-quin lones, the acid addition salts thereof, and processes for preparing the same. azolone, wherein R1, R2 and R3 are as previously de?ned. Alkyl groups defined by R2 preferably contain up to 3 7 The compounds of this invention have the following structural formula: 0 carbon atoms. In another embodiment of this invention 3-(1-lower 15 alkyl-3-pyrrolidylmethyl)~4-quinazolone may be prepared by reacting substantially equimolar amounts of isotoic Rs \ limit \ Ny R: N/ anhydride and l-lower alkyl-S-pyrrolidylrnethylamine. The initial step of the reaction may be carried out by 20 1 wherein R1 is a lower alkyl, preferably containing up heating the reactants, isotoic anhydride and pyrro1idyl~ methyl-amine, in a solvent under substantially anhydrous conditions to form a pyrrolidylmethylanthranilamide as an intermediate, The completion of the formation of the intermediate is determined by the cessation of gas to about 6 carbon atoms; R2 is selected from the group 25 (carbon dioxide) evolution. One preferred solvent for this step is an alcohol, such as ethanol. The intc1'medi— consisting of hydrogen and lower alkyl, such as methyl, ate product is then reacted with an organic acid, such ethyl and propyl; and R3 is selected from the group con as formic acid, preferably with heating, to produce the sisting of hydrogen and halogen, wherein the halogen is desired product. In lieu of formic acid, organic acids of preferably selected from the group consisting of chlorine and bromine. The nontoxic, pharmacologically accept 30 the formula R2-COOI-l may be used, wherein R2 is as previously de?ned. Re?uxing is a convenient mode of able, therapeutically active acid addition salts of these carrying out this step of the process. Halogenated isotoic anhydrides used as starting ma— terials in lieu of isotoic anhydride per se may be pre The compounds of the present invention have valuable therapeutic and pharmacological properties and are par 35 pared by well known methods using halogenated an thanilic acid as a starting material. ticularly useful as anti-in?ammatory agents. They may The acid addition salts of the compounds of this inven be administered orally in the form of tablets, capsules, or compounds are also contemplated as part of this inven tion. tion may be prepared by conventional procedures. Ex in a suitable liquid vehicle, such a syrup or an elixir, and emplary of some useful nontoxic, pharmacologically ac 40 ceptable salts are the hydrochlorides, hydrobromides, ace milligrams per kilogram of body weight per day. tates, mucates, tartrates, sulfates and the like. The compounds of this invention may be prepared by The following examples will illustrate the preparation the reaction of a l-lower alkyl-3-pyrrolidylmethylamine of the compounds of this invention. with a compound selected from the group consisting of The starting materials, acetanthranil and haloacetan ‘anthranils, halogenated anthranilsor isotoic anhydrides. thranil, used in the synthesis of certain of the compounds Hydrocarbon solvents, such as toluene, xylene and the the preferred dosage for mammals is about 1 to about 3 45 like, are useful reaction media. In one embodiment of this invention, 2-lower alkyl-3-(1-lower alkyl-3-pyrrolidyl of this invention, were prepared as follows: A. Acetanthranil One hundred three grams ‘(0.75 mole) of anthranilic methyl)-4-quinazolone may be prepared by heating a mix ture of equimolar amounts of l-lower alkyl-3-pyrrolidyl methylamine with an anthranil in a solvent, such as t0l~ 50 acid were added portionwise over a period of 15 minutes to 213 milliliters (2.25 mole) of acetic anhydride main uene. To prepare the corresponding halogenated quinaz tained at 120-130" C. in a 500 milliliter three-necked flask equipped with magnetic stirrer, thermometer and clone of this embodiment, a halogenated anthranil, such as, for example, chloroacetanthranil, is substituted in the process as a starting material in lieu of acetan- ' Claissen head attached to a condenser. The addition was described reaction: collected. The residue was ?ltered hot and diluted with 500 milliliters of isopropyl ether. Cooling gave a buff colored solid which was dried in vacuo over phosphorus thranil. The following equation illustrates the above 55 slightly exothermic. The ?ask was then heated until 160 milliliters of distillate (boiling point 116-124° C.) were EQUATION I 60 Ra“ pentoxide. The solid was suspended in 600 milliliters of hot isopropyl ether and an insoluble sludge removed by ?ltration. The liquor was treated with Nuchar activated charcoal, and cooled to furnish 90 grams, or an 80% yield of acetanthranil having a melting point of 7 8-8l° C. 3,073,828 4 B. 6-C/1loroacetanlhranil The reaction of 17.2 grams (0.1 mole) of 2-amino-5 chlorobenzoic acid and 30 milliliters of acetic anhydride gave, after recrystallizations from benzene-isopropyl ether, 17.5 grams of 6-chloroacetanthranil, having a melt ing point of 118—124° C. compositions prepared by procedures illustrated in the foregoing examples. The compound of Example III was prepared by the procedure of Example II. The com pounds of Examples IV through VII were prepared by the procedure of Example I. The starting material for Examples VI and VII was 6-chloroacetanthranil. TABLE I.~3-PYRROLIDYLMETHYL~4-QUINAZOLONES EXAMPLE I 2-Methyl-3- (I-Etlzyl-3-Pyrr0lidylmethyl) ~4-Quinazolone Di/zydrochloride RP‘ A solution of 8.1 grams (0.05 mole) of acetanthranil )1 N-OH LR, in 60 milliliters of dry toluene was added to a stirred solu N/ l tion of 7.7 grams (0.06 mole) of 1-ethyl-3-pyrrolidyl methylamine. The mixture was stirred under re?ux with concurrent separation of Water for 22 hours, during which 15 78% of the theoretical Water separated. The solution containing some tarry material Was diluted with 200 mil Melting Purl Exam- R; R; R; Point, 0021Salt liliters of ether, washed with 5% sodium hydroxide, and ple ° . tionl then extracted with dilute hydrochloric acid. The acid (dam) extracts were combined, washed with ether, and basi?ed with concentrated aqueous sodium hydroxide. The aque III-_.._ C2135 H H 133-135 b-c Dlhydrochloride. IV.... __ CH: OH; H 177-179 a—d Heminnucate. ous mixture was extracted with four 70 milliliter portions V_____ __ CH3 OH: H 232-240 c-e Dihydrochloride. VI ____ _. CH3 H3 01 244-250 8-1' D0. of chloroform, and the combined chloroform solutions VII_.._- C2115 CH5 Cl 208-211 g~ceh Monohydro were washed with water and dried. Concentration of chloride. the chloroform furnished 12.7 grams of an oil. The oil was dissolved in 50 milliliters of absolute ethanol, and 1 The letters appearing in this column refer to the solvents from which the products were recrystallized, as follows: 100 milliliters of butanone and two equivalents of al (0) ethanol; (12) isopropanol; (c) absolute ethanol; ((1) water; (e) buta coholic hydrogen chloride were added to furnish 11 grams none; (I) methanol; (9) acetonitrile; (h) ether. of a butt solid, having a melting point of 236-239" C. While several particular embodiments of this invention The solid was dissolved in 100 milliliters of methanol and 30 are shown above, it will be understood, of course, that 150 milliliters of butanone were added. The solution was the invention is not limited thereto, since many modi?ca boiled with the addition of butanone to maintain a constant tions may be made, and it is contemplated, therefore, volume until a solid separated. Cooling gave 10.5 grams by the appended claims, to cover any such modi?cations of a butt solid, having a melting point of 247-250" C. The as fall within the true spirit and scope of this invention. melting point was unchanged upon recrystallization from I claim: absolute ethanol. Analysis by ultraviolet absorption in . 1. A compound selected from the group consisting of a compound of the formula: 317 mu, 305 mu, 275 mu, 267 mu and 228 mu; e=3,270, 4,200, 7,200, 7,570 and 28,900. EXAMPLE II 3-(] ~MetlzyI-3-Pyrrolidylmethyl) -4-Quinaz0lone Dihydrochloride A mixture of 8.2 grams (0.05 mole) of isotoic an hydride and 5.7 grams (0.05 mole) of l-methyl-B-pyr 45 rolidylmethylamine in 75 milliliters of absolute ethanol wherein R1 is lower alkyl, R2 is selected from the group was re?uxed, the reaction being accompanied by vigorous consisting of hydrogen and lower alkyl, and R3 is selected gas evolution and solution of the reactants. The resultant from the group consisting of hydrogen and halogen and solution was concentrated in vacuo to a syrupy residue nontoxic pharmacologically acceptable therapeutically which was again re?uxed with 75 milliliters of formic acid 50 the active acid addition salts thereof. for 3 hours. The solution was then concentrated in vacuo, 2. 2-lower alkyl~3-(1-lower alkyl-3-pyrrolidylmethyl) and the residue mixed with chipped ice and made strongly 4-qu1'nazolone. alkaline with 40% sodium hydroxide. The oily mixture 3. 3-(1~lower alkyl-3-pyrrolidylmethyl)-4-quinazolone. was extracted with 175 milliliters of chloroform, and the (a Cl 4. 2-lower alkyl-3-(1-lower alkyl-3-pyrrolidylmethyl) chloroform solution was washed with brine and dried over chloro-4~quinazolone. magnesium sulfate. Eleven and four-tenths grams of oil 5. 3-(1-l0wer alkyl-3-pyrrolidylmethyl)-chloro-4-quin were obtained upon concentration of the chloroform, the azolone. oil was dissolved in absolute ethanol-butanone, and two 6. 3-( 1methyl-3-pyrrolidylmethyl) -4-quinazolone. equivalents of ethanolic hydrogen chloride were added 7. 3-(1-ethyl-3-pyrrolidylmethyl)-4-quinazolone. portionwise during which addition a solid separated. A 60 8. 2 - methyl-3-(1-methyl-3-pyrrolidylmethyl)-4-quin product yield of 12.5 grams or 79% resulted. The melt azolone. ing point of the product varied with the amount of sample 9. 2 - methyl-3-(1-ethyl-3-pyrrolidylmethyl)-4-quinaz0 and rate of heat, and after recrystallization from ethanol lone. at small sample melted at 218~220° C. using very slow heating. Analysis by ultraviolet absorption in 0.1 nor 10. 2-methyl-3-( 1-methyl-3-pyrrolidylmethyl) ~6-chlor0 a 4-quinazolone. mal sodium hydroxide gave the following values: A== 314 mu, 302 mu, 275 mu, 266 mu and 238 mu; e=2,530, 3,160, 5,430, 5,650 and 22,600. 11. 2 - methyl-3-( 1-ethyl-3-pyrrolidylmethyl)~6-chloro 4-quinazolone. The 3-(1-ethyl-3-pyrrolidylmethyl) derivatives con templated by this invention may be prepared in a manner 70 similar to the above compound. The following table illustrates the properties of further References Cited in the ?le of this patent Baker et a1.: J. Org. Chem, Volume 17, pages 35-36 (1952).