Process for producing optically active 3-halogenocarboxylic acid ester and 3-azidocarboxylic acid ester
申请人:——
公开号:US20030225301A1
公开(公告)日:2003-12-04
A process for producing an optically active 3-azide-carboxylic acid ester by reacting an optically active 3-hydroxycarboxylic acid ester and a thionyl halide in the presence of a basic substance in an organic solvent to produce an optically active 3-halogenocarboxylic acid ester which is then reacted with an azide salt represented by the formula: MN
3
(wherein M is an alkaline metal) in water or a mixture of water and a water soluble organic solvent.
Process for producing optically active 3-halogenocarboxylic acid esters and 3-azide-carboxylic acid esters
申请人:Takasago International Corporation
公开号:EP1344763A1
公开(公告)日:2003-09-17
A process for producing an optically active 3-azide-carboxylic acid ester by reacting an optically active 3-hydroxycarboxylic acid ester and a thionyl halide in the presence of a basic substance in an organic solvent to produce an optically active 3-halogenocarboxylic acid ester which is then reacted with an azide salt represented by the formula: MN3 (wherein M is an alkaline metal) in water or a mixture of water and a water soluble organic solvent.
一种生产光学活性 3-叠氮羧酸酯的工艺,在有机溶剂中,在碱性物质存在下,使光学活性 3-羟基羧酸酯和硫酰基卤反应,生成光学活性 3-卤代羧酸酯,然后使其与式 MN3(其中 M 为碱金属)代表的叠氮盐反应:MN3(其中 M 为碱金属)在水或水与水溶性有机溶剂的混合物中反应。
METHOD FOR PREPARING POLYLACTATE AND COPOLYMER THEREOF USING A MUTANT MICROORGANISM WITH ENHANCED POLYLACTATE, AND THE COPOLYMER PRODUCING CAPABILITY THEREOF
申请人:LG Chem, Ltd.
公开号:EP2314638A2
公开(公告)日:2011-04-27
Provided is a method of preparing polylactate (PLA) or a copolymer thereof using a mutant microorganism in which a gene participating in a coenzyme A (CoA) donor- and lactate-producing pathway is genetically manipulated to increase the productivity of a CoA donor and lactate. Amounts of the CoA donor and the lactate are simultaneously increased in a microbial metabolic pathway to enable effective biosynthesis of PLA and a hydroxyalkanoate-lactate copolymer having a high content of lactate, which is industrially useful.
Mutant of propionyl-CoA transferase from Clostridium propionicum and preparing method for PLA or PLA copolymer using the same
申请人:LG Chem, Ltd.
公开号:EP2636744A1
公开(公告)日:2013-09-11
Provided is a mutant of propionyl-CoA transferase from Clostridium propionicum that can convert lactate into lactyl-CoA with high efficiency in a method of preparing a polylactate (PLA) or PLA copolymer using microorganisms. Unlike conventional propionyl-CoA transferase which is weakly expressed in E.coli, when a mutant of propiony-CoA transferase from Clostridium propionicum is introduced into recombinant E.coli, lactyl-CoA can be supplied very smoothly, thereby enabling highly efficient preparation of polylactate (PLA) and PLA copolymer.