Anthracene adducts (4)–(6) are synthesized via a convenient general synthesis and subjected to a retroDiels-Alderreaction to furnish the corresponding 2-methylene-1,3-dioxygenated cyclopentenes and cyclopentanes (1)–(3)via either flashvacuum pyrolysis or room temperature silica gel-catalysed decomposition.
作者:Weerachai Phutdhawong、Stephen G. Pyne、Apiwat Baramee、Duang Buddhasukh、Brian W. Skelton、Allan H. White
DOI:10.1016/s0040-4039(02)01216-9
日期:2002.8
A synthesis of (±) epipentenomycin I and III is reported from a regioselectiveepoxidation of racemic 3-hydroxy- and 3-acetoxy-2-methylene-4-cyclopentenone, respectively, with dimethyldioxirane followed by hydrolytic ring-opening of the resulting epoxide.