Syntheses and nuclear magnetic resonance studies of some sterically hindered methylenedihydroanthracenes bearing methyl groups in the 1, 8-aryl or methylene …
PT Leung, DY Curtin
文献索引：Leung,P.-T.; Curtin,D.Y. Journal of the American Chemical Society, 1975 , vol. 97, # 23 p. 6790 - 6799
Abstract: A versatile synthetic route for the preparation of 9-methylene-1, 8, 10, 10- tetramethyl-9, 1O-dihydroanthracene(la) and several of its vinyl derivatives (lb, IC, and Id) is described. The key step in the scheme involves the closing of the central ring of the dihydroanthracene system. The preferred axial conformation of 9-substituents in the I, 8, 10, IO-tetramethyl-9, IO-dihydroanthracenes is confirmed by the observation of a nuclear ...
