Synthesis of macrocyclic propargylic alcohols by ene-type cyclization of unsaturated acetylenic aldehydes
摘要:
Ene type cyclizations of ynals 6,21, and 30 can be effected by EtAlCl2 in CH2Cl2 at -78-degrees-C to afford 14-and 12-membered homoallylic propargylic alcohols in 66-89% yield.