ZnCl<sub>2</sub>Promoted Formal (3+2) Cycloaddition Reactions of 2-Alkoxy-1,4-benzoquinones with 2<i>H</i>-Chromenes
作者:Kandasamy Subburaj、Modachur G. Murugesh、Girish K. Trivedi
DOI:10.1080/00397919608005223
日期:1996.8
Abstract A simple, mild, inexpensive and highly efficient method for the synthesis of 2,2-dimethyldihydropyranopterocarpans (4a–h and 5a–b) by formal (3+2) cycloaddition reactions of 2-alkoxy-1,4-benzoquinones (3a–b) with 2H-chromenes (1a–d and 2) using ZnCl2 at room temperature has been developed.
摘要 一种通过 2-烷氧基-1,4-苯醌 (3a) 的形式 (3+2) 环加成反应合成 2,2-二甲基二氢吡喃蕨类植物 (4a-h 和 5a-b) 的简单、温和、廉价且高效的方法-b) 与 2H-色烯(1a-d 和 2)在室温下使用 ZnCl2 已开发。