Chiral relay effects influence the facial selectivity of N-alkylated 5-phenylmorpholin-2-one enolates
摘要:
Alkylation studies on the enolate of N-methyl morpholinone 7 clearly reveal that the observed cis-selectivity is consistent with a chiral relay system operating to invert the stereochemical information of the auxiliary's C-5 stereogenic centre. (C) 1998 Elsevier Science Ltd. All rights reserved.
Synthesis of Morpholin-2-ones by Chemoselective Intramolecular Rhodium-Catalyzed Reductive Ring Expansion of Oxazolidines
作者:Maksym Vasylyev、Howard Alper
DOI:10.1021/ol703135w
日期:2008.4.1
The rhodium-catalyzed reductive intramolecular ring expansion of N-(ethoxycarboxymethyl)oxazolidines was carried out under an atmosphere of carbon monoxide and hydrogen to afford N-methylmorpholin-2-ones in good to excellent yields.