A practical procedure for the removal of the phenylethanol moiety from phenylglycinol-derived lactams
作者:Vladislav Semak、Carmen Escolano、Carlos Arróniz、Joan Bosch、Mercedes Amat
DOI:10.1016/j.tetasy.2010.09.014
日期:2010.10
Chiral non-racemic bicyclic lactams derived from phenylglycinol have been appointed as key building blocks for the preparation of enantiopure nitrogen compounds The removal of the chiral inductor leading to substituted piperidones by using air or oxygen in basic media is presented (C) 2010 Elsevier Ltd All rights reserved
Enantioselective syntheses of the indole alkaloid (+)-R-decarbomethoxytetrahydrosecodine and its enantiomer
The alkaloid (+)-R-decarbomethoxytetrahydrosecodine (+)-1 has been synthesized by alkylation of (R)-3-ethylpiperidine with 3-(2-bromoethyl)-2-ethylindole (7). The required enantiopure piperidine was prepared by alkylation of the chiral non-racemic oxazolopiperidone (+)-trans-8 followed by reduction of the lactam carbonyl group and removal of the chiral auxiliary, whereas tryptophyl bromide 7 was obtained