A facile and efficient one-pot, single-step method for deracemizing a broad range of 2-hydroxyacids to (R)-2-hydroxyacids was established by combination of resting cells of an (S)-hydroxyacid dehydrogenase-producing microorganism and an (R)-ketoacid reductase-producing microorganism.
通过将产生(S)-羟酸脱氢酶的微生物的静止细胞与( R)-产生酮酸还原酶的微生物。
[EN] QUINONE METHIDE ANALOG SIGNAL AMPLIFICATION<br/>[FR] AMPLIFICATION DU SIGNAL D'ANALOGUES DE QUINONEMÉTHIDES
申请人:VENTANA MED SYST INC
公开号:WO2015124703A1
公开(公告)日:2015-08-27
Disclosed herein are novel quinone methide analog precursors and embodiments of a method and a kit of using the same for detecting one or more targets in a biological sample. The method of detection comprises contacting the sample with a detection probe, then contacting the sample with a labeling conjugate that comprises an enzyme. The enzyme interacts with a quinone methide analog precursor comprising a detectable label, forming a reactive quinone methide analog, which binds to the biological sample proximally to or directly on the target. The detectable label is then detected. In some embodiments, multiple targets can be detected by multiple quinone methide analog precursors interacting with different enzymes without the need for an enzyme deactivation step.
Asymmetric synthesis of optically active methyl-2-benzamido-methyl-3-hydroxy-butyrate by robust short-chain alcohol dehydrogenases from Burkholderia gladioli
Specific short-chain alcohol dehydrogenases were discovered and used in the dynamic kinetic asymmetric transformation of methyl 2-benzamido-methyl-3-oxobutanoate with excellent stereo-selectivity.
METHOD FOR PREPARING P-HYDROXYMANDELIC COMPOUNDS IN STIRRED REACTORS
申请人:Rhodia Operations
公开号:US20170183283A1
公开(公告)日:2017-06-29
The process allows the preparation of a p-hydroxymandelic compound, comprising at least one step of condensation of at least one aromatic compound bearing at least one hydroxyl group and whose para position is free, with glyoxylic acid, the condensation reaction being performed in at least one reactor equipped with at least one mixing means, the specific mixing power being between 0.1 kW/m
3
and 15 kW/m
3
. In addition, the invention also relates to a process for preparing a 4-hydroxyaromatic aldehyde by oxidation of this p-hydroxymandelic compound.
Method for separating mandelic compounds in salified form and use of same for preparing aromatic aldehyde
申请人:RHODIA OPERATIONS
公开号:US20160318839A1
公开(公告)日:2016-11-03
The invention describes a method for separating a mandelic compound in salified form from an aqueous reaction medium resulting from the condensation reaction of a hydroxylated aromatic compound with glyoxylic acid in a basic medium, said method comprising a) decanting said reaction medium in such a way as to recover an organic phase formed from the excess of said aromatic compound and an aqueous phase formed from said mandelic compound and a quantity of the excess of said aromatic compound and b) bringing said aqueous phase into contact with an adsorbent support, resulting in the selective adsorption of said aromatic compound and the recovery of an aqueous flow comprising said mandelic compound in salified form, which is subjected to an oxidation step before being converted into hydroxyaromatic aldehyde by electrodialysis.