happened via an exclusively SN2′ pathway. Acetates of the Baylis–Hillman alcohols derived from alkyl acrylates, ethyl vinyl ketone and phenyl vinyl sulfone provided exclusively (E)-1,5-diarylpent-1-en-4-ynes while the acetates of the Baylis–Hillman alcohols derived from acrylonitrile provided exclusively (Z)-1,5-diarylpent-1-en-4-ynes.
Pd催化Baylis-Hillman醇的
乙酸酯与炔基
羧酸的
乙酸脱羧烯丙基偶联导致以高度区域和立体选择性的方式形成重要的1,5-二芳基戊-1-烯-4-炔。脱羧偶联仅通过S N 2'途径发生。衍生自
丙烯酸烷基酯,乙基
乙烯基酮和
苯基乙烯基砜的Baylis-Hillman醇的
乙酸盐仅提供(E)-1,5-二芳基戊-1-烯-4-炔,而Baylis-Hillman醇的
乙酸盐则衍生自
丙烯腈专门提供(Z)-1,5-diarylpent-1-en-4-ynes。