One-pot synthesis of substituted cyclopentenes was accomplished through a copper-mediated [4 + 1]-annulation of active methylene compounds with Morita–Baylis–Hillman (MBH) acetates of acetylenic aldehydes. The reaction sequence involves the cascade allylic substitution/5-exo-dig-carbocyclization, which was effective in providing methylene, alkylidene as well as arylidene cyclopentenes.
通过
铜催化的活性次甲基化合物与炔
丙醛Morita-Baylis-Hillman(MBH)
乙酸酯之间的[4+1]环化反应,成功实现了取代
环戊烯的一锅法合成。该反应序列涉及级联亲电性烯丙基取代/5-外向-挖环碳环化反应,对合成次甲基、亚烷基及亚苯基
环戊烯均非常有效。