[EN] PROCESS FOR THE SYNTHESIS OF CYCLIC CARBAMATES<br/>[FR] PROCÉDÉ DE SYNTHÈSE DE CARBAMATES CYCLIQUES
申请人:LONZA AG
公开号:WO2012048884A1
公开(公告)日:2012-04-19
The invention is directed to a process for the preparation of a cyclic carbamate starting with a chiral propargylic alcohol and/or a suitable salt thereof, which is reacted with a cyclisation agent selected from phosgene, diphosgene, triphosgene and mixtures thereof, and in that the reaction is carried out in the presence of an aqueous base, and a water-immiscible organic solvent, said organic solvent mainly comprising at least one compound selected from C2-5-alkyl C2-5-carboxylates and mixtures of at least one C2-5-alkyl C2-5-carboxylate with at least one C5-8-alkane. Another aspect of the invention is directed to a process for the synthesis of said cyclic carbamate starting described above, wherein also a process for the preparation of the chiral propargylic alcohol is provided.
[EN] PROCESS FOR THE SYNTHESIS OF CHIRAL PROPARGYLIC ALCOHOLS<br/>[FR] PROCÉDÉ DE SYNTHÈSE DE D'ALCOOLS PROPARGYLIQUES CHIRAUX CYCLIQUES
申请人:LONZA AG
公开号:WO2012048887A1
公开(公告)日:2012-04-19
A process for the synthesis of chiral propargylic alcohols.
手性丙炔基醇的合成过程。
Hydroamination of cinnamyl alcohol using lithium amides
作者:Conor S. Barry、Nigel S. Simpkins
DOI:10.1016/j.tetlet.2007.09.086
日期:2007.11
Hydroamination of cinnamyl alcohol is possible by reaction with lithium amides derived from primary or cyclic secondary amines. (c) 2007 Elsevier Ltd. All rights reserved.