New method for preparation of coumarins and quinolinones via Pd-catalyzed intramolecular hydroarylation of CC triple bonds

…, D Piao, T Kitamura, Y Fujiwara

Index: Jia, Chengguo; Piao, Dongguo; Kitamura, Tsugio; Fujiwara, Yuzo Journal of Organic Chemistry, 2000 , vol. 65, # 22 p. 7516 - 7522

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Citation Number: 191

Abstract

A new and general method has been developed for preparation of coumarins and quinolinones by intramolecular hydroarylation of alkynes. Various aryl alkynoates and alkynanilides undergo fast intramolecular reaction at room temperature in the presence of a catalytic amount of Pd (OAc) 2 in a mixed solvent containing trifluoroacetic acid (TFA), affording coumarins and quinolinones in moderate to excellent yields with more than 1000 ...