作者:N. B. Chernysheva、A. A. Bogolyubov、V. V. Murav'ev、V. V. Elkin、V. V. Semenov
DOI:10.1023/a:1002881002737
日期:——
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.