作者:Maozhong Miao、Jian Cao、Jingjing Zhang、Xian Huang、Luling Wu
DOI:10.1021/jo302312y
日期:2013.3.15
CuCl-catalyzed cyclization–dimerization reactions of 3-cyclopropylideneprop-2-en-1-ones provide an interesting route to benzofuran-7(3aH)-one derivatives with one highly strained three-membered ring and one four-membered ring via intramolecular cycloisomerization, sequential bimolecular [4 + 2] cycloaddition, opening of the oxa-bridge, and ring contraction. Furthermore, the reaction was monitored by NMR experiments
CuCl催化的3-环亚丙基丙-2-烯-1-酮的环化-二聚反应提供了一条有趣的途径,可以通过分子内分子与具有一个高应变三元环和一个四元环的苯并呋喃-7(3a H)-一衍生物环异构化,连续的双分子[4 + 2]环加成,氧杂桥的打开和环的收缩。此外,通过NMR实验监测反应以揭示一些关键中间体。