Synthesis of Chiral Nonracemic 1-(2-Pyridinyl)ethylamines:  Stereospecific Introduction of Amino Function onto the 2-Pyridinylmethyl Carbon Center

Stereospecific substitutions of optically pure 1-(pyridinyl)ethyl methanesulfonates with various amines are described. The reaction of (R)- or (S)-1-(2-pyridinyl)ethyl methanesulfonate with primary amines, including amino acid esters, gives N-substituted (S)- or (R)-1-(2-pyridinyl)ethylamines (4) wi...

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Bibliographic Details
Published in:Journal of organic chemistry 2004-10, Vol.69 (20), p.6781-6789
Main Authors: Uenishi, Jun'ichi, Hamada, Masahiro, Aburatani, Sachiko, Matsui, Katsuya, Yonemitsu, Osamu, Tsukube, Hiroshi
Format: Article
Language:English
Subjects:
Chemistry
Exact sciences and technology
Heterocyclic compounds
Heterocyclic compounds with only one n hetero atom and condensed derivatives
Organic chemistry
Preparations and properties
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Summary:Stereospecific substitutions of optically pure 1-(pyridinyl)ethyl methanesulfonates with various amines are described. The reaction of (R)- or (S)-1-(2-pyridinyl)ethyl methanesulfonate with primary amines, including amino acid esters, gives N-substituted (S)- or (R)-1-(2-pyridinyl)ethylamines (4) with inversion of the configuration. Secondary cyclic amines are also reacted with (R)-2 to give the corresponding substituted amines (5) in excellent yields. Optically pure and meso triamine ligands having two pyridine rings, (S,S)- 4f and meso- 4f, (S,S)- 9e, (S,R)- 9e, and (S,S)- 9f, have been prepared in stereochemically pure form by this method. Not only the substitution reaction of optically active 2 but also that of 1-(4-pyridinyl)ethyl and 1-(3-pyridinyl)ethyl methanesulfonates 11 and 14 take place stereospecifcally with inversion of the chiral center.
ISSN:0022-3263
1520-6904
DOI:10.1021/jo0491758