Stereoselective Grignard additions to N-formyl hydrazone: a concise synthesis of NoxafilR side chain and a synthesis of NoxafilR
摘要:
Addition of ethyl Grignard reagent to the formyl hydrazone 11 via in situ silylation provided the corresponding formyl hydrazine with excellent diastereoselectivity in favor of the desired S,S-diastereoisomer 6. Treatment of 6 with the phenyl carbamate 13 efficiently provided the O-benzyl protected Noxafil, which was deprotected to provide Noxafil(R). (C) 2004 Elsevier Ltd. All rights reserved.
PROCESS FOR THE PREPARATION OF TRIAZOLE ANTIFUNGAL DRUG, ITS INTERMEDIATES AND POLYMORPHS THEREOF
申请人:MSN Laboratories Limited
公开号:EP2758385B1
公开(公告)日:2018-03-28
US20140343285A1
申请人:——
公开号:US20140343285A1
公开(公告)日:2014-11-20
US5693626A
申请人:——
公开号:US5693626A
公开(公告)日:1997-12-02
US9102664B2
申请人:——
公开号:US9102664B2
公开(公告)日:2015-08-11
[EN] PROCESS FOR THE PREPARATION OF TRIAZOLE ANTIFUNGAL DRUG, ITS INTERMEDIATES AND POLYMORPHS THEREOF<br/>[FR] PROCÉDÉ POUR LA PRÉPARATION DE MÉDICAMENT ANTIFONGIQUE TRIAZOLE, SES INTERMÉDIAIRES ET POLYMORPHES DE CELUI-CI
申请人:MSN LAB LTD
公开号:WO2013042138A2
公开(公告)日:2013-03-28
The present invention relates to a process for the preparation of 4-[4-[4-[4-[[(3R,5R)-5-(2,4-difluorophenyl) tetrahydro-5-(1H-1,2,4-triazol-1-ylmethyl)-3-furanyl]methoxy]phenyl]-1-piperazinyl] phenyl]-2-[(1S,2S)-1-ethyl-2-hydroxypropyl]-2,4-dihydro-3H-1,2,4-triazol-3-one compound of formula-1, its intermediates and polymorphs thereof.