Cesium Hydroxide Promoted Chemoselective <i>N</i>-Alkylation for the Generally Efficient Synthesis of Secondary Amines
作者:Ralph N. Salvatore、Advait S. Nagle、Shaun E. Schmidt、Kyung Woon Jung
DOI:10.1021/ol9910417
日期:1999.12.1
[GRAPHICS]Selective N-alkylation of primary amines was developed using cesium hydroxide to prepare various secondary amines efficiently. A cesium base not only promoted monoalkylations of primary amines but also suppressed overalkylations. Various amines and alkyl bromides were examined, and the preliminary results demonstrated this methodology was highly chemoselective, favoring mono-N-alkylation over dialkylation. In particular, use of amino acid derivatives afforded the desired secondary amines exclusively.
SIGMA RECEPTOR LIGANDS AND THE USE THEREOF
申请人:VIRGINIA COMMONWEALTH UNIVERSITY
公开号:EP0591426A1
公开(公告)日:1994-04-13
US6057371A
申请人:——
公开号:US6057371A
公开(公告)日:2000-05-02
[EN] SIGMA RECEPTOR LIGANDS AND THE USE THEREOF
申请人:——
公开号:WO1991009594A1
公开(公告)日:1991-07-11
[EN] The invention relates to methods for the treatment of schizophrenia or other psychoses by administering a pharmaceutical composition comprising an effective amount of certain sigma receptor ligands to a patient in need of such treatment. The invention further relates to novel sigma receptor ligands having high binding to the sigma receptor and pharmaceutical compositions thereof. [FR] Procédés de traitement de la schizophrénie ou d'autres psychoses, par administration d'une composition pharmaceutique comprenant une quantité efficace de certains ligands de récepteur sigma, à un patient nécessitant un tel traitement. L'invention concerne également de nouveaux ligands de récepteur sigma, présentant une liaison élevée aux récepteurs sigma, ainsi que leurs compositions pharmaceutiques.
Cesium Effect: High Chemoselectivity in Direct N-Alkylation of Amines
作者:Ralph Nicholas Salvatore、Advait S. Nagle、Kyung Woon Jung
DOI:10.1021/jo010643c
日期:2002.2.1
A novel method for the mono-N-alkylation of primary amines, diamines, and polyamines was developed using cesium bases in order to prepare secondaryamines efficiently. A cesium base not only promoted alkylation of primary amines but also suppressed overalkylations of the produced secondaryamines. Various amines, alkyl bromides, and alkyl sulfonates were examined, and the results demonstrated this