Cyclopentane synthesis and annulation II: Radical cyclizations of oxathiolanones
作者:Veejendra Yadav、Alex G. Fallis
DOI:10.1016/s0040-4039(00)99222-0
日期:1989.1
A general procedure for the synthesis of diverse cyclopentanols via free-radical cyclization of 1,3-oxathiolan-5-ones is described. This permits the rapid assembly, by intramolecular annulation, of various ring systems for use in total synthesis.
Diiodosamarium, a unique catalyst precursor for ene reactions of unsaturated carbonyl compounds
作者:Tarun K. Sarkar、Sandip K. Nandy
DOI:10.1016/0040-4039(96)01049-0
日期:1996.7
SmI2 presents catalytic activity for ene cyclizations of a series of unsaturated carbonylcompounds, some of which are prone to rearrangement or polymerization under standard conditions.