Synthesis of 2,3-di-(2-adamantylidene)succinic anhydride: A highly non-photochromic overcrowded fulgide

摘要

A two-step Stobbe condensation of adamantan-2-one with dimethyl succinate and then dimethyl (2-adamantylidene)succinate affords a half-ester 5, which on hydrolysis and dehydration gives the title fulgide 7.