Reaction of benzocyclobutenoxides with nitriles: Synthesis of hypecumine and other 3-substituted isoquinolines
作者:John J. Fitzgerald、Forrest E. Michael、R.A. Olofson
DOI:10.1016/0040-4039(94)88462-5
日期:1994.12
Treatment of benzocyclobuten-2-ols with MeLi affords o-tolualdehyde anions which in the presence of nitriles cyclize to 3-substituted isoquinolines. Examples include the synthesis of the alkaloid hypecumine from the precursors, 14 and 19 (1:1), in 50% yield.
用MeLi处理苯并环丁烯-2-醇可得到邻甲苯甲醛阴离子,在腈存在下,它们可环化为3-取代的异喹啉。实例包括从前体14和19(1:1)以50%的收率合成生物碱hypercumine 。