SYNTHESIS METHOD FOR L-CYCLIC ALKYL AMINO ACID AND PHARMACEUTICAL COMPOSITION HAVING THEREOF
申请人:ASYMCHEM LABORATORIES (TIANJIN) CO., LTD
公开号:US20160319312A1
公开(公告)日:2016-11-03
A synthesis method for L-cyclic alkyl amino acid and a pharmaceutical composition having the said amino acid are provide in the present disclosure provides. The synthesis method comprises: step A.) preparing a cyclic alkyl keto acid or a cyclic alkyl keto acid salt having Structural Formula (I) or Structural Formula (II), and step B.) mixing the cyclic alkyl keto acid or the cyclic alkyl keto acid salt with ammonium formate, a leucine dehydrogenase, a formate dehydrogenase and a coenzyme NAD
+
, and carrying out a reductive amination reaction to generate the L-cyclic alkyl amino acid, wherein the Structural Formula (I) is
where n
1
≧1, m
1
≧0 and the M
1
is H or a monovalent cation; the Structural Formula (II) is
where n
2
≧0, m
2
≧0, the M
2
is H or a monovalent cation, an amino acid sequence of the leucine dehydrogenase is SEQ ID No.1.
Synthetic Photochemistry. III. The Addition Reaction of Methyl Acetopyruvate to Cycloheptatriene: An Ene Reaction and (4+2)π and (6+2)π Cycloadditions
作者:Hitoshi Takeshita、Akira Mori、Shô Itô
DOI:10.1246/bcsj.47.1767
日期:1974.7
of methyl acetopyruvate with cycloheptatriene by means of a high-pressure mercury lamp has yielded (6+2)π and (4+2)π cycloadducts, together with tropylcarbinol derivatives formed by a formal abstraction of allylic hydrogen by the excited carbonyl group, this being the major process in this reaction.
Biocatalytic Synthesis of Homochiral 2-Hydroxy-4-butyrolactone Derivatives by Tandem Aldol Addition and Carbonyl Reduction
作者:Carlos J. Moreno、Karel Hernández、Samantha Gittings、Michael Bolte、Jesús Joglar、Jordi Bujons、Teodor Parella、Pere Clapés
DOI:10.1021/acscatal.3c00367
日期:2023.4.21
hydroxymethyltransferase (KPHMTEcoli), 2-keto-3-deoxy-l-rhamnonate aldolase (YfaUEcoli), and trans-o-hydroxybenzylidene pyruvate hydratase-aldolase from Pseudomonas putida (HBPAPputida) and (ii) subsequent 2-oxogroup reduction of the aldol adduct by ketopantoate reductase from E. coli (KPREcoli) and a Δ1-piperidine-2-carboxylate/Δ1-pyrroline-2-carboxylate reductase from Pseudomonas syringae pv. tomato DSM 50315
3-methyl-2-oxobutanoate hydroxymethyltransferase from E. coli (KPHMT) and variants thereof. The 3,3,3-trisubstituted 2-oxoacids thus produced were converted into 2-oxolactones and 3-hydroxy acids and directly to ulosonic acid derivatives, all bearing gem-dialkyl, gem-cycloalkyl, and spirocyclic quaternary centers. In addition, some of these reactions use a single enantiomer from racemic nucleophiles to afford