A convenient synthetic entry into aldehydes with extended conjugation
摘要:
Variable-length donor-acceptor polyenes 1-18 were synthesized. In the key step, a polyenal was appended to an aromatic donor through nucleophilic attack oi an organolithium reagent on a vinylogous amide. Yields of aldehydes and dialdehydes in the one-pot process ranged from 12-64% and depended upon number of repeat units (n=1-3) in the polyene chain. (C) 1997 Elsevier Science Ltd.