Aryllead triacetates as synthons for the synthesis of biflavonoids. Part 1. Synthesis and reactivity of a flavanonyllead triacetate
作者:Dervilla M. X. Donnelly、Brendan M. Fitzpatrick、Jean-Pierre Finet
DOI:10.1039/p19940001791
日期:——
The 8-triacetoxyplumbylflavane derivative 11 was prepared in 4 steps in 28% overall yield from 4',5,7-flavanone. It reacted with the benzofuranone allyl beta-keto ester 12 to yield a 8-(benzofuran-2-yl)flavanone 13 in 66%. Removal of the allyl ester group and cleavage of the dioxolane ring afforded the 8-(3-oxobenzofuran-2-yl)flavanone. This reaction shows that complex polyfunctional aryllead triacetates can be made and selectively coupled with activated ketones.
BARTON, DEREK H. R.;DONNELLY, DERVILLA M. X.;FINET, JEAN-PIERRE;GUIRY, PA+, TETRAHEDRON LETT., 31,(1990) N6, C. 6637-6640
作者:BARTON, DEREK H. R.、DONNELLY, DERVILLA M. X.、FINET, JEAN-PIERRE、GUIRY, PA+