Synthesis of dibenzocyclohepta[1,2-<i>a</i>]naphthalene derivatives from phenylacetaldehyde and alkynyl benzyl alcohols <i>via</i> sequential electrophilic addition and double Friedel–Crafts reactions
作者:Archana K. Sahu、Ramanjaneyulu Unnava、Bipin K. Behera、Anil K. Saikia
DOI:10.1039/d1ob00057h
日期:——
been developed for the synthesis of substituted 9H-dibenzo[3,4:6,7]-cyclohepta[1,2-a]naphthalenes from phenylacetaldehydes and ortho-alkynyl benzyl alcohols in the presence of a Lewis acid in moderate to good yields within a short reaction time. Interestingly, the reaction proceeds through a highly regioselective electrophilic addition followed by double Friedel–Crafts reaction to form uncommon dibenzo-fused
已经开发了一种简单的方法,用于在路易斯酸存在下,由苯乙醛和邻炔基苄基醇合成取代的9 H-二苯并[3,4:6,7]-环庚[1,2- a ]萘。在较短的反应时间内中度到良好的收率。有趣的是,该反应是通过高度区域选择性的亲电加成反应进行的,然后进行两次Friedel-Crafts反应,形成不常见的二苯并稠合的七元碳环。