Stereoselective Synthesis, Molecular Geometry, and Oxidation of (5-Isopropyl-2-methylpyrrolidin-2-yl)phosphonates
摘要:
Intramolecular aminomercuration of (1-amino-1,5-dimethylhex-4-enyl)phosphonates was shown to be regio- and stereoselective and to lead to (5-isopropyl-2-methylpyrrolidin-2-yl)phosphonates. The stereoselectivity was shown to be controlled by the experimental conditions. The configurations of the chiral carbons for the diastereomers were determined by X-ray and NMR analysis. Oxidation of the pyrrolidin-2-ylphosphonates with m-CPBA led to diastereomeric nitroxides exhibiting different phosphorus splitting and different half-lives.
An Improved Reduction Procedure in the Synthesis of Substituted Pyrrolidines via An Aminomercuration/Reduction Sequence of Primary Alkenylamines
作者:Valérie Roubaud、François Le Moigne、Anne Mercier、Paul Tordo
DOI:10.1080/00397919608003517
日期:1996.4
Aminomercuration/reduction sequence of delta-alkenylamines is a typical route to substituted pyrrolidines. Backward reaction to the starting material is a major drawback which occurs during sodium borohydride reduction of the intermediate organomercurial. We describe here a new reduction procedure which prevents almost completely this backward reaction and leads to significant increases in the yields of pyrrolidines.
Roubaud Valerie, Le Moigne Francois, Mercier Anne, Tordo Paul, Phosph., Sulfur and Silicon and Relat. Elem, 86 (1994) N 1-4, S 39-54
作者:Roubaud Valerie, Le Moigne Francois, Mercier Anne, Tordo Paul
DOI:——
日期:——
Stereoselective Synthesis, Molecular Geometry, and Oxidation of (5-Isopropyl-2-methylpyrrolidin-2-yl)phosphonates
作者:Francois Le Moigne、Paul Tordo
DOI:10.1021/jo00091a024
日期:1994.6
Intramolecular aminomercuration of (1-amino-1,5-dimethylhex-4-enyl)phosphonates was shown to be regio- and stereoselective and to lead to (5-isopropyl-2-methylpyrrolidin-2-yl)phosphonates. The stereoselectivity was shown to be controlled by the experimental conditions. The configurations of the chiral carbons for the diastereomers were determined by X-ray and NMR analysis. Oxidation of the pyrrolidin-2-ylphosphonates with m-CPBA led to diastereomeric nitroxides exhibiting different phosphorus splitting and different half-lives.