Synthesis of Coumarins via Palladium-Catalyzed Carbonylative Annulation of Internal Alkynes by <i>o</i>-Iodophenols
作者:Dmitry V. Kadnikov、Richard C. Larock
DOI:10.1021/ol0065569
日期:2000.11.1
A variety of substituted coumarins have been prepared in good yields by the palladium-catalyzed coupling of o-iodophenols with internalalkynes and 1 atm of carbon monoxide. Unlike most of the previous work on the palladium-catalyzed carbonylation of alkynes, the insertion of the internalalkyne occurs in preference to the insertion of CO.