[EN] PROCESS FOR THE SYNTHESIS OF CYCLIC CARBAMATES<br/>[FR] PROCÉDÉ DE SYNTHÈSE DE CARBAMATES CYCLIQUES
申请人:LONZA AG
公开号:WO2012048886A1
公开(公告)日:2012-04-19
The invention is directed to a process for the preparation of a cyclic carbamate starting with o-aminobenzyl 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 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.
Process for the synthesis of chiral propargylic alcohols
申请人:Lonza Ltd
公开号:EP2447247A1
公开(公告)日:2012-05-02
A process for the synthesis of chiral propargylic alcohols.
手性丙炔醇的合成过程。
Process for the synthesis of cyclic carbamates
申请人:Lonza Ltd
公开号:EP2447255A1
公开(公告)日:2012-05-02
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 PREPARATION OF EFAVIRENZ BY CYCLISATION<br/>[FR] PROCÉDÉ POUR LA PRÉPARATION D'ÉFAVIRENZ PAR CYCLISATION
申请人:LONZA AG
公开号:WO2012097510A1
公开(公告)日:2012-07-26
The invention disclosed a process for the preparation of the HIV drug Efavirenz, also known as DMP-266, starting from 1,4-dichlorobenzene, and its intermediates.