One-Pot Synthesis of B-Ring <i>Ortho</i>-Hydroxylated Sappanin-Type Homoisoflavonoids
作者:Galyna P. Mrug、Nataliia V. Myshko、Svitlana P. Bondarenko、Vitaliy M. Sviripa、Mykhaylo S. Frasinyuk
DOI:10.1021/acs.joc.9b00814
日期:2019.6.7
A reliable method for the synthesis of B-ring hydroxylated homoisoflavonoids and 3-hetarylmethyl chromones has been developed. The method involves an initial oxa-Diels–Alder reaction of ortho-quinone methides generated from aryl/hetaryl-substituted ortho-(N,N-dimethylaminomethyl)phenols with (2E)-3-(N,N-dimethylamino)-1-(2-hydroxyphenyl)prop-2-en-1-ones and the subsequent cascade of reactions. This