Diastereoselective synthesis of 4-hydroxycyclopentenones from (3-alkoxycarbonyl-2-oxo-propylidene)triphenylphosphorane and chiral glyoxals
作者:Minoru Hatanaka、Yasuhiro Tanaka、Ikuo Ueda
DOI:10.1016/0040-4039(95)00662-v
日期:1995.5
An enantioselective synthesis of 4-hydroxycyclopentenones in a single operation has been described using the annulation of (3-allyloxycarbonyl-2-oxo-propylidene)triphenylphosphorane with chiral glyoxals.
(3-Alkoxycarbonyl-2-oxo-propylidene)triphenylphosphorane reacts with 1,2-diacylethylenes to give cyclopentenones in a single operation. Use of a chiral acylmethylenemalonate led to formation of optically active cyclopentenone in a highly diastereoselective fashion.