Consecutive cyclization of allylaminoalkenes by tandem aminolithiation-carbolithiation proceeded smoothly by using a lithium amide as a lithiating agent as well as protonating agent to give bicyclic amines, octahydroindolizine and hexahydro-1 H-pyrrolizine, in reasonably high yield and diastereoselectivity.
Trimethylsilyldiazomethane. -tert-Butyl aryloxypyruvates react with trimethylsilyldiazomethane to give dihydrooxazulenes (VI) in low yields. -(TSUCHIDA, S.; HARI, Y.; AOYAMA*, T.; Heterocycles 65 (2005) 11, 2667-2674; Grad. Sch. Pharm. Sci., Nagoya City Univ., Mizuho, Nagoya 467, Japan; Eng.) -Mais 13-117
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