Reductive Amination of Aldehydes and Ketones with Sodium Triacetoxyborohydride. Studies on Direct and Indirect Reductive Amination Procedures<sup>1</sup>
作者:Ahmed F. Abdel-Magid、Kenneth G. Carson、Bruce D. Harris、Cynthia A. Maryanoff、Rekha D. Shah
DOI:10.1021/jo960057x
日期:1996.1.1
triacetoxyborohydride is presented as a general reducing agent for the reductiveamination of aldehydes and ketones. Procedures for using this mild and selective reagent have been developed for a wide variety of substrates. The scope of the reaction includes aliphatic acyclic and cyclic ketones, aliphatic and aromatic aldehydes, and primary and secondary amines including a variety of weakly basic and
Cyclic derivatives as modulators of chemokine receptor activity
申请人:Carter H. Percy
公开号:US20050054627A1
公开(公告)日:2005-03-10
The present application describes modulators of MCP-1 of formula (I):
or pharmaceutically acceptable salt forms thereof, useful for the treatment of rheumatoid arthritis, multiple sclerosis, atherosclerosis and asthma.
An enantioselective desymmetric nucleophilic α‐addition of cyclohexanone to propiolamide has been developed through a 6‐exo‐dig cyclization reaction. By employing simple and readily available L‐proline sodium salt as a bifunctional catalyst, a series of chiral 6,6‐bicyclic bridged products bearing morphan scaffold have been isolated in good yields and excellent enantioselectivities. Density functional
The key steps of the synthetic approach are an atom transfer radical cyclization of a trichloroacetamide upon an enol acetate to generate the B ring, and a sulfone-based conjugatedaddition upon a β-methyl-α,β-unsaturated ketone to give the target azatricyclic ketone. Selecting the cation (K+ or Cs+) of the carbonate in the C ring-forming intramolecular Michael addition gives stereodivergent access to
[DE] SUBSTITUIERTE 5, 6, 7, 8-TETRAHYDRO-PYRIDO[4, 3-d]PYRIMIDIN-2-YL- UND 5, 6, 7, 8-TETRAHYDRO-CHINAZOLIN-2-YL-VERBINDUNGEN<br/>[EN] SUBSTITUTED 5, 6, 7, 8-TETRAHYDRO-PYRIDO[4, 3-D]PYRIMIDINE-2-YL COMPOUNDS AND 5, 6, 7, 8-TETRAHYDRO-QUINAZOLINE-2-YL COMPOUNDS<br/>[FR] COMPOSES DE 5, 6, 7, 8-TETRAHYDRO-PYRIDO[4, 3-D]PYRIMIDINE-2-YL ET DE 5, 6, 7, 8-TETRAHYDRO-QUINAZOLINE-2-YL SUBSTITUEES
申请人:GRUENENTHAL GMBH
公开号:WO2005105759A1
公开(公告)日:2005-11-10
Die vorliegende Erfindung betrifft substituierte 5,6,7,8-Tetrahydro-pyrido[4,3-d]pyrimidin-2-yl- und 5,6,7,8-Tetrahydro-chinazolin-2-yl-Verbindungen, Verfahren zu ihrer Herstellung, Arzneimittel enthaltend diese Verbindungen sowie deren Verwendung zur Herstellung von Arzneimitteln.