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2005
Rings with 7 or more members
Q 0050
Ring Expansion of Sulfur Substituted p-Quinamines: Regiospecific Synthesis
4-Aminotropones. — An efficient regioselective synthesis of 4-aminotropones
27- 070 of
[cf. (II), (VII)] through a cyclization-ring expansion of p-quinamines bearing a 4-arylsulfinyl or -sulfonylmethyl group in the presence of NaH is developed. Moreover, preliminary studies on the reactivity of these tropones using compound (IIa) as a model in
Diels—Alder and photocyclization reactions are described. — (CARRENO*, M. C.;
SANZ-CUESTA, M. J.; RIBAGORDA, M.; Chem. Commun. (Cambridge) 2005, 8,
1007-1009; Dep. Quim. Org., Univ. Auton., Cantoblanco, E-28049 Madrid, Spain;
Eng.) — R. Staver
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