Reaction of bromo dipoles with (Z)-4-(arylmethylene)azol-5-ones. Substrate-controlled synthesis of new bromo-substituted heterocyclic spirans and unusual N-benzoyl alpha-aminoacids

摘要

Bromo spirans 6 and 7 and unusual alpha-aminoacids 8 were prepared as diastereoisomerically pure compounds from bromo dipoles and (Z)-4-arylmethyleneazolones.