A facile route to 3a,8a-dihydrofuro[2,3-b]benzofurans
摘要:
Consecutive employment of palladium-catalysis and samarium(II)iodide-induced radical chemistry allows access to analogues of the ABC enol ether tricycle of aflatoxin B-1 (1). The Pd-assisted coupling of tribulylstannyl ethers of various 2-iodophenols with 2,5-diacetoxy-2,5-dihydrofuran (4) provided products that could be cyclised into 3a,8a-dihydrofuro[2,3-b]benzofurans using SmI2. Elimination of an acetatosamarium species provides the requisite unsaturation in situ.
A facile route to 3a,8a-dihydrofuro[2,3-b]benzofurans
作者:Cedric W. Holzapfel、D. Bradley、G. Williams
DOI:10.1016/0040-4020(95)00456-i
日期:1995.7
Consecutive employment of palladium-catalysis and samarium(II)iodide-induced radical chemistry allows access to analogues of the ABC enol ether tricycle of aflatoxin B-1 (1). The Pd-assisted coupling of tribulylstannyl ethers of various 2-iodophenols with 2,5-diacetoxy-2,5-dihydrofuran (4) provided products that could be cyclised into 3a,8a-dihydrofuro[2,3-b]benzofurans using SmI2. Elimination of an acetatosamarium species provides the requisite unsaturation in situ.