Silver(I)-Catalyzed Novel Cascade Cyclization Reactions: Incorporation of Allenes into the Isochromenes
作者:Nitin T. Patil、Nirmal K. Pahadi、Yoshinori Yamamoto
DOI:10.1021/jo051524q
日期:2005.11.1
The silver(I)-catalyzed reaction of alkynones with alcohols represents a general tool for the synthesis of 1-allenyl isochromenes. The reaction most probably proceeds via the formation of benzopyrylium cation, which subsequently undergoes nucleophilic attack of an alcohol to give the annulation products.