[EN] IMPROVED AMINOHYDROXYLATION OF ALKENES<br/>[FR] AMINOHYDROXYLATION AMÉLIORÉE D'ALCÈNES
申请人:IND RES LTD
公开号:WO2011159177A1
公开(公告)日:2011-12-22
The invention relates to a process for the aminohydroxylation of alkenes using N-oxycarbamate reagents, e.g. N-acyloxycarbamate, N-alkyloxycarbonyloxycarbamate and N-aralkoxycarbonyloxycarbamate reagents. The invention particularly relates to an intermolecular aminohydroxylation reaction that can be carried out in the absence of added base. The invention also relates to novel N-oxycarbamate reagents that are stable crystalline materials. The process of the invention is useful in the synthesis of compounds having a vicinal amino alcohol moiety, such as biologically active compounds.
Exploring the Scope of an α/β-Aminomutase for the Amination of Cinnamate Epoxides to Arylserines and Arylisoserines
作者:Prakash K. Shee、Nishanka Dilini Ratnayake、Tyler Walter、Olivia Goethe、Edith Ndubuaku Onyeozili、Kevin D. Walker
DOI:10.1021/acscatal.9b01557
日期:2019.8.2
signals confirmed the diastereomeric ratios and relative stereochemistries. Application of a (2S)-threonine aldolase from E. coli further established the absolute stereochemistry of the chiral derivatives of the diastereomeric enzymatically derived products. The 2R:2S ratio for the biocatalyzed anti-isomers was highest (88:12) for 3′-NO2-phenylserine and lowest (66:34) for 4′-F-phenylserine. This showed
Transacylases of the paclitaxel biosynthetic pathway
申请人:Washington State University Research Foundation
公开号:US20030108891A1
公开(公告)日:2003-06-12
Transacylase enzymes and the use of such enzymes to produce paclitaxel and related taxoids, as well as intermediates in the paclitaxel biosynthetic pathway, are disclosed. Also disclosed are nucleic acid sequences encoding such transacylase enzymes such as (but without limitation) C-13 phenylpropanoid side chain-CoA acyltransferase and benzoyl-CoA:3′-N-debenzoyl-2′-deoxytaxol N-benzoyltransferase.
Highly homogeneous molecular markers for electrophoresis
申请人:Invitrogen Corporation
公开号:US20040014082A1
公开(公告)日:2004-01-22
The invention relates to marker molecules for identifying physical properties of molecular species separated by the use of electrophoretic systems. The invention further relates to methods for preparing and using marker molecules.
The<i>N</i>-Hydroxymethyl Group as a Traceless Activating Group for the CAL-B-Catalysed Ring Cleavage of β-Lactams: A Type of Two-Step Cascade Reaction
作者:Enikő Forró、Zsolt Galla、Ferenc Fülöp
DOI:10.1002/ejoc.201600234
日期:2016.5
An efficient enzymatictwo-stepcascade procedure has been devised for rapid access to diverse amino acids from N-hydroxymethyl-β-lactams; representative amino acids include the antifungal agent cispentacin, intermediates for the taxolside-chain, and assorted cathepsin inhibitors. When CAL-B-catalysed hydrolyses of racemic N-hydroxymethyl-β-lactams were performed with H2O (0.5 equiv.) in iPr2O at