Nucleophilic Acylation of o-Quinone Methides: An Umpolung Strategy for the Synthesis of α-Aryl Ketones and Benzofurans
摘要:
The synthesis of alpha-aryl ketones is accomplished by the direct nucleophilic acylation of o-quinone methide electrophiles. In this process, two reactive intermediates, carbonyl anions and o-quinone methides, are generated in one flask upon treatment of the corresponding thiazolium carbinols and silyl protected phenols with a soluble fluoride source. These intermediates then undergo productive addition reactions to afford the desired alpha-aryl ketone adducts. This new strategy has been applied to a short synthesis of the natural product demethylmoracin I.
[EN] AROMATASE INHIBITORS FROM BROUSSONETIA PAPYRIFERA<br/>[FR] INHIBITEURS DE L'AROMATASE PROVENANT DE BROUSSONETIA PAPYRIFERA
申请人:UNIV ILLINOIS
公开号:WO2003013554A2
公开(公告)日:2003-02-20
A composition and method of cancer treatment is disclosed. The composition and method utilize the extract of B. papyrifera, or compounds included therein having aromatase inhibition properties, as active cancer chemopreventative and treating agents in mammals, including humans.