Di-, tri-, and tetrasubstituted β-lactones are accessible in a one-step procedure by a Reformatskyreaction of phenyl α-bromoalkanoates with ketones or aldehydes at a sacrificial indium anode. With indium powder comparable results are obtained. The yield of β-lactones is significantly lower, if zinc is used instead of indium.
Synthesis of .beta.-Lactones via a Spontaneous Intramolecular Cyclization of O-Lithiated Phenyl .beta.-Hydroxyalkanoates Obtained by Aldolization of Ketones or Aldehydes with Lithium Enolates of Phenyl Esters
作者:Christine Wedler、Annamarie Kunath、Hans Schick
DOI:10.1021/jo00108a052
日期:1995.2
A Versatile Preparation of 2-Methyleneoxetanes
作者:Lisa M. Dollinger、Amy R. Howell
DOI:10.1021/jo9611733
日期:1996.1.1
Wedler Christine, Kunath Annamarie, Schick Hans, J. Org. Chem, 60 (1995) N 3, S 758-760
作者:Wedler Christine, Kunath Annamarie, Schick Hans
DOI:——
日期:——
.alpha. Deprotonation of .beta.-lactones - an example of a forbidden .beta. elimination