Synthetic Studies of Amino Acids by the Use of Copper Complex. II. The Condensation Reaction of<i>N</i>-Pyruvylideneglycinatocopper(II) Complexes with various Aldehydes
mechanism of the reaction which involves the base-catalyzed condensation of bis(glycinato)copper(II) with aldehydes was carried out with the purpose of improving it so that it can proceed even with lower molar equivalent ratios of aldehydes to the complex and under milder conditions. On the basis of the results reported in the literature and those of this investigation, the reaction has been carried
对涉及双(甘氨酸)铜 (II) 与醛的碱催化缩合的反应机理进行了研究,目的是对其进行改进,使其即使在醛与醛的摩尔当量比较低的情况下也能进行。复杂且条件温和。根据文献报道的结果和本次调查的结果,该反应按预期进行,并新表明适用于对甲苯甲醛和对氯苯甲醛,而且适用于此类醛糖衍生物通过在反应中使用 N-pyruvylideneglycinatocopper (II) 配合物代替双 (glycinato) 铜 (II),作为 2,3-O-异亚丙基-D-甘油醛。本通信还将描述进一步改进的尝试。
Synthetic Studies of Amino Acids by the Use of Copper(II) Complexes. V. The Preparation of Hydroxy Amino Acids by a Set of Improved Procedures
A variety of hydroxy amino acids were prepared by a brief treatment of a resulting mixture, which was obtained by a base-catalyzedcondensation reaction of N-pyruvylideneglycinatoaquocopper(II) with aldehydes, on a column of Amberlite IR-120B (H form) resin.
在 Amberlite IR-120B(H 型)树脂柱上,通过 N-pyruvylideneglycinatoaquocopper (II) 与醛的碱催化缩合反应获得的混合物,通过简单处理制备了多种羟基氨基酸.
ENGINEERED ALDOLASE POLYPEPTIDES AND USES THEREOF
申请人:Enzymaster (Ningbo) Bio-Engineering Co., Ltd
公开号:US20200123525A1
公开(公告)日:2020-04-23
The present invention provides engineered polypeptides that are useful for the asymmetric synthesis of β-hydroxy-α-amino acids under industrial-relevant conditions. The present disclosure also provides polynucleotides encoding engineered polypeptides, host cells capable of expressing engineered polypeptides, and methods of producing β-hydroxy-α-amino acids using engineered polypeptides. Compared to other processes of preparation, the use of the engineered polypeptides of the present invention for the preparation of β-hydroxy-α-amino acids results in high purity of the desired stereoisomers, mild reaction conditions, low pollution and low energy consumption. So, it has good industrial application prospects.