One-pot synthesis of ortho -acylphenols by palladium-catalyzed phenol C–H addition to nitriles
作者:Tao-Shan Jiang、Bei Gan、Xi Wang、Xiuli Zhang
DOI:10.1016/j.tetlet.2017.09.062
日期:2017.11
The regioselective one-pot synthesis of ortho-acylphenols via the palladium-catalyzedaddition of phenols to nitriles and subsequent hydrolysis is reported. The acylation reaction proceeded smoothly using the Pd(OAc)2/DMSO system and TFA as the additive. This method also provides a direct strategy for the synthesis of a salicylketoxime scaffold.
A Facile Synthesis of Highly Functionalized 4-Arylcoumarins via Kostanecki Reactions Mediated by DBU
作者:In-Taek Hwang、Sun-Ah Lee、Jin-Soo Hwang、Kee-In Lee
DOI:10.3390/molecules16086313
日期:——
An efficient synthesis of 4-arylcoumarins has been accomplished via Kostanecki reactions of 2-hydroxybenzophenones with acetic anhydride employing DBU at ambient temperature. Using the same strategy, several 2-acyloxybenzophenone derivatives were readily converted to 3,4-difunctionalized coumarins. This protocol offers a notable improvement in reaction conditions for coumarin synthesis and takes advantage of its synthetic capability, especially for highly functionalized 4-arylcoumarins with structural diversity.