Conformationally Restricted Calix[8]arenes Substituted at All Methylene Bridges
摘要:
Reaction under S(N)1 conditions of the octabromocalix[8]arene derivative 2d with alcohols proceeds in nonstereoselective fashion, but all-cis octaryl derivatives are the single major products in the reaction with arenes. The incorporation of aryl substituents at the bridges rigidifies the calix[8] arene skeleton.