Diels-alder reactions of α-vinylidene-γ-butyrolactones.
作者:Frédéric Fotiadu、Albert Archavlis、Gérard Buono
DOI:10.1016/s0040-4039(00)97752-9
日期:1990.1
α-Vinylidene-γ-butyrolactones 2 and 4 are readily prepared via the reaction of ylides 1 or 3 with ketene. Diels-Alder cycloadditions of these compounds with typical dienes are described, addition of 2 to cyclopentadiene giving predominantly the exo stereomer.
A Ring Size-Selective Reduction of Lactones Using SmI<sub>2</sub> and H<sub>2</sub>O
作者:Lorna A. Duffy、Hiroshi Matsubara、David J. Procter
DOI:10.1021/ja078137d
日期:2008.1.30
The Sml(2)-H2O reducing systems shows complete selectivity for six-membered lactones over other classes of lactone and esters. Experimental and computational studies suggest that the origin of the selectivity lies in the initial electron-transfer to the lactone carbonyl.
Sanemitsu, Yuzuru; Uematsu, Tamon; Inoue, Satoru, Agricultural and Biological Chemistry, 1984, vol. 48, # 7, p. 1927 - 1930