Palladium-catalyzed carbonylative annulation of terminal alkynes: synthesis of coumarins and 2-quinolones
DV Kadnikov, RC Larock
Index: Kadnikov, Dmitry V.; Larock, Richard C. Journal of Organometallic Chemistry, 2003 , vol. 687, # 2 p. 425 - 435
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Citation Number: 54
Abstract
o-Iodophenols and o-iodoaniline derivatives react with terminal alkynes 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. Terminal alkynes bearing alkyl, aryl, silyl, hydroxyl, ester and cyano substituents are effective in these processes affording the desired products in moderate yields. The formation of coumarins and 2-quinolones in this process ...
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