4-Methylenedioxolan-2-ones as convenient synthons for the preparation of natural products of the berbine and calycotomine series
作者:I. Yu. Titov、N. B. Chernysheva、Yu. B. Chudinov、A. A. Bogolyubov、V. V. Semenov
DOI:10.1007/s11172-006-0293-0
日期:2006.3
Intramolecular amidoalkylation of nonactivated 3-(2-arylethyl)-4-hydroxyoxazolidin-2-ones in polyphosphoric acid gave oxazolo[4,3-a]isoquinolin-3-one whose hydrolysis affords isoquinoline β-amino alcohols, calycotomine analogs. Using the developed procedure, 13,13,13a-trimethylberbine was synthesized.
未活化的 3-(2-芳乙基)-4-羟基恶唑烷-2-酮在多磷酸中进行分子内酰胺烷基化,得到恶唑并[4,3-a]异喹啉-3-酮,其水解得到异喹啉 β-氨基醇、花萼胺类似物。使用开发的程序,合成了 13,13,13a-三甲基小檗碱。