A practical chemoenzymatic synthesis of (R)-isovaline based on the asymmetric hydrolysis of 2-ethyl-2-methyl-malonamide
摘要:
(R)-Isovaline has potential applications in drug development, and therefore the development of an efficient method for the production of (R)-isovaline is desired. Herein we have investigated the asymmetric hydrolysis of 2-ethyl-2-methyl-malonamide into (S)-2-ethyl-2-methyl-malonamic acid, a useful synthetic intermediate in the production of (R)-isovaline, using CsAM, which is a recombinant amidase originally derived from Cupriavidus sp. KNK-J915. The produced (S)-2-ethyl-2-methyl-malonamic acid (98.6% ee) could be easily converted into (R)-isovaline by the Hofmann rearrangement. Starting from diethyl 2-methylmalonate, we obtained (R)-isovaline (99.1% ee) in 58.6% yield over eight steps, including the CsAM-catalyzed asymmetric hydrolysis of 2-ethyl-2-methyl-malonamide. (C) 2014 Elsevier Ltd. All rights reserved.
The invention provides compounds of formula (I): Said compounds being inhibitors of Kv3 channels and of use in the prophylaxis or treatment of related disorders.
[EN] HYDANTOIN DERIVATIVES USEFUL AS KV3 INHIBITORS<br/>[FR] DÉRIVÉS D'HYDANTOÏNE UTILES EN TANT QU'INHIBITEURS DE KV3
申请人:AUTIFONY THERAPEUTICS LTD
公开号:WO2012076877A1
公开(公告)日:2012-06-14
The invention provides compounds of formula (I): Said compounds being inhibitors of Kv3 channels and of use in the prophylaxis or treatment of related disorders.
[EN] HYDANTOIN DERIVATIVES USEFUL AS KV3 INHIBITORS<br/>[FR] DÉRIVÉS D'HYDANTOÏNE UTILES COMME INHIBITEURS DE KV3
申请人:AUTIFONY THERAPEUTICS LTD
公开号:WO2013083994A1
公开(公告)日:2013-06-13
The invention provides compounds of formula (I): Said compounds being modulators of Kv3 channels and of use in the prophylaxis or treatment of related disorders.
该发明提供了化合物的公式(I):所述化合物是Kv3通道的调节剂,并用于预防或治疗相关疾病。
NOVEL COMPOUNDS
申请人:AUTIFONY THERAPEUTICS LIMITED
公开号:US20140323508A1
公开(公告)日:2014-10-30
The invention provides compounds of formula (I): Said compounds being modulators of Kv3 channels and of use in the prophylaxis or treatment of related disorders.
该发明提供了式(I)的化合物:所述化合物是Kv3通道的调节剂,并用于预防或治疗相关疾病。
[EN] HYDANTOIN MODULATORS OF KV3 CHANNELS<br/>[FR] HYDANTOÏNES UTILISÉES EN TANT QUE MODULATEURS DE CANAUX KV3
申请人:AUTIFONY THERAPEUTICS LTD
公开号:WO2017103604A1
公开(公告)日:2017-06-22
The invention provides compounds of formula (I): Said compounds being inhibitors of Kv3 channels and of use in the prophylaxis or treatment of related disorders.