3689-55-2Relevant articles and documents
One-Pot Asymmetric Synthesis of an Aminodiol Intermediate of Florfenicol Using Engineered Transketolase and Transaminase
Deng, Zixin,Huang, Tingting,Lin, Shuangjun,Liu, Qi,Shi, Ting,Tang, Mancheng,Tao, Wentao,Xie, Xinyue,Zhang, Yuanzhen,Zhao, Yilei
, p. 7477 - 7488 (2021/06/30)
Florfenicol is the 3′-fluoro derivative of thiamphenicol and has been widely used in veterinary medicine for its high antibacterial activity and safety. However, the development of simplified and environmentally friendly catalytic methods for the stereoselective production of florfenicol is a key challenge. Herein, we established a highly stereoselective enzymatic one-pot reaction for the synthesis of an aminodiol intermediate of florfenicol bearing two stereocenters from industrial raw material 4-(methylsulfonyl) benzaldehyde by coupling transketolase (TK) and ω-transaminase (TA). The enantioselectivity of TK from E. coli was converted from (S) (93% ee) to (R) (95% ee), and we also inverted the enantiopreference (E(S) = 9 to E(R) = 12) and ketone/aldehyde substrate selectivity of TA ATA117 via structure-guided enzyme engineering. Docking calculations and molecular dynamics simulations of the wild-type and mutant enzymes unveiled the molecular basis for enzymatic stereocontrol. Using the engineered TK and TA, (1R,2R)-p-methylsulfonyl phenylserinol was biosynthesized with good yield (76%) and high stereoselectivity (96% de and >99% ee). Our work established an enzymatic synthetic route to (1R,2R)-p-methylsulfonyl phenylserinol, facilitating the development of a chemoenzymatic method for producing florfenicol.
Triphenilphosphonium analogs of chloramphenicol as dual-acting antimicrobial and antiproliferating agents
Abad, Etna,Antonenko, Yuri N.,Bogdanov, Alexey A.,Kajiwara, Susumu,Khairullina, Zimfira Z.,Konevega, Andrey L.,Lukianov, Dmitrii A.,Lyakhovich, Alex,Makarov, Gennady I.,Murayama, Somay Y.,Nazarov, Pavel A.,Osterman, Ilya A.,Paleskava, Alena,Pavlova, Julia A.,Skvortsov, Dmitry A.,Sumbatyan, Natalia V.,Tereshchenkov, Andrey G.,Volynkina, Inna A.
, (2021/05/10)
In the current work, in continuation of our recent research, we synthesized and studied new chimeric compounds, including the ribosome-targeting antibiotic chloramphenicol (CHL) and the membrane-penetrating cation triphenylphosphonium (TPP), which are lin
Stereocontrolled synthesis of syn-β-hydroxy-α-amino acids by direct aldolization of pseudoephenamine glycinamide
Seiple, Ian B.,Mercer, Jaron A. M.,Sussman, Robin J.,Zhang, Ziyang,Myers, Andrew G.
supporting information, p. 4642 - 4647 (2014/05/20)
β-Hydroxy-α-amino acids figure prominently as chiral building blocks in chemical synthesis and serve as precursors to numerous important medicines. Reported herein is a method for the synthesis of β-hydroxy- α-amino acid derivatives by aldolization of pseudoephenamine glycinamide, which can be prepared from pseudoephenamine in a one-flask protocol. Enolization of (R,R)- or (S,S)-pseudoephenamine glycinamide with lithium hexamethyldisilazide in the presence of LiCl followed by addition of an aldehyde or ketone substrate affords aldol addition products that are stereochemically homologous with L- or D-threonine, respectively. These products, which are typically solids, can be obtained in stereoisomerically pure form in yields of 55-98 %, and are readily transformed into β-hydroxy-α-amino acids by mild hydrolysis or into 2-amino-1,3-diols by reduction with sodium borohydride. This new chemistry greatly facilitates the construction of novel antibiotics of several different classes. On aldol: Enolization of (R,R)- or (S,S)-pseudoephenamine glycinamide with lithium hexamethyldisilazide (LiHMDS) in the presence of LiCl followed by addition of either an aldehyde or ketone substrate affords aldol addition products which are stereochemically homologous with L- or D-threonine, respectively. These products can be obtained in stereoisomerically pure form in yields of 55-98 %, and are readily transformed into β-hydroxy-α-amino acids by mild hydrolysis or into 2-amino-1,3-diols by reduction.
