A new method for the preparation of 3-isochromanone derivatives is reported. The method consists of the ethoxycarbonylation of o-acylbenzyllithiums with ethylchloroformate and the subsequent NaBH4...
Substitution controlled aryne insertion: synthesis of diarylmethane/chromones
作者:Jadhav Rahul Dhanaji、Polasani Samatha、Silver Raju、Prathama S. Mainkar、Raju Adepu、Srivari Chandrasekhar
DOI:10.1039/d2cc05992d
日期:——
Aryne insertion reaction with 2-aroyl malonates/cyanoesters lead to the formation of diarylmethane or chromones depending on the substitution on the aryne ring. The presence of an electronegative atom at the ortho position of arynes generates chromones, whereas other arynes lead to the formation of diarylmethanes, via a cascade double aryne insertion.