Multicomponent Coupling Approach to (±)-Frondosin B and a Ring-Expanded Analogue
摘要:
A recently discovered multicomponent coupling reaction is used to give direct access to a late intermediate in the synthesis of frondosin B. This intermediate can also be efficiently converted to a ring-expanded analogue of frondosin B by sustained heating of the reaction mixture. An unprecedented tandem 1,7-hydrogen shift, 8pi-electrocyclization is proposed to explain the formation of this ring-expanded species.
Multicomponent Coupling Approach to (±)-Frondosin B and a Ring-Expanded Analogue
摘要:
A recently discovered multicomponent coupling reaction is used to give direct access to a late intermediate in the synthesis of frondosin B. This intermediate can also be efficiently converted to a ring-expanded analogue of frondosin B by sustained heating of the reaction mixture. An unprecedented tandem 1,7-hydrogen shift, 8pi-electrocyclization is proposed to explain the formation of this ring-expanded species.
Multicomponent Coupling Approach to (±)-Frondosin B and a Ring-Expanded Analogue
作者:Daniel J. Kerr、Anthony C. Willis、Bernard L. Flynn
DOI:10.1021/ol035822q
日期:2004.2.1
A recently discovered multicomponent coupling reaction is used to give direct access to a late intermediate in the synthesis of frondosin B. This intermediate can also be efficiently converted to a ring-expanded analogue of frondosin B by sustained heating of the reaction mixture. An unprecedented tandem 1,7-hydrogen shift, 8pi-electrocyclization is proposed to explain the formation of this ring-expanded species.