Palladium-catalyzed carbonylative annulation of terminal alkynes: synthesis of coumarins and 2-quinolones
作者:Dmitry V Kadnikov、Richard C Larock
DOI:10.1016/s0022-328x(03)00786-1
日期:2003.12
o-Iodophenols and o-iodoaniline derivatives react with terminalalkynes under 1 atm of CO in the presence of pyridine and catalytic amounts of Pd(OAc)2 to generate coumarins and 2-quinolones, respectively, as the only products. Terminalalkynes bearing alkyl, aryl, silyl, hydroxyl, ester and cyano substituents are effective in these processes affording the desired products in moderate yields. The formation