A compound and method for producing an enantiomerically enriched epoxide from an olefin using a chiral ketone and an oxidizing agent is disclosed.
一种化合物及其生产方法被披露,该方法使用手性酮和氧化剂从烯烃生产具有对映体富集的环氧乙烷。
CRYSTAL OF CYCLIC PHOSPHONIC ACID SODIUM SALT AND METHOD FOR MANUFACTURING SAME
申请人:OTSUKA CHEMICAL CO., LTD.
公开号:US20170233421A1
公开(公告)日:2017-08-17
An object of the present invention is to provide a crystal of a cyclic phosphonic acid sodium salt (2ccPA) with high purity and excellent storage stability and a method for producing the crystal. The present invention provides a crystal of a cyclic phosphonic acid sodium salt (2ccPA) represented by formula (1):
Anodic Cleavage of Several Ketone <i>N</i>-Phenylsemicarbazones into Methyl <i>N</i>-Phenylcarbamate and the Corresponding Dimethyl Acetals
作者:Shinnosuke Nishikawa、Haruki Yamamori、Kousuke Ohashi、Mitsuhiro Okimoto、Masayuki Hoshi、Takashi Yoshida
DOI:10.1080/00397911.2012.667184
日期:2013.7.3
Abstract Several ketone N-phenylsemicarbazones were electrooxidized in the presence of potassium iodide and a base using methanol as the solvent to give nearly commensurate amounts of methyl N-phenylcarbamate and the corresponding dimethyl acetals. Continuous evolution of gaseous nitrogen was observed from the anolyte during the electrooxidation. The reactions were carried out under very mild reaction
was used in phase-transfer alkylations and Michael additions to afford various opticallyactive α-amino acid equivalents in up to 93% yield. Moreover, dramatic counter anion effects were observed in phase-transfer catalysis (PTC) for the first time, making it possible to further improve reactivity and selectivity. These findings validate the usefulness of three-dimensional fine-tuning of the catalyst
Enzymatic process for the preparation of butyrolactones
申请人:Lonza Ltd
公开号:EP2634180A1
公开(公告)日:2013-09-04
The invention relates to a process for the preparation of a compound of formula
wherein R1 is selected from the group consisting of hydrogen, C2-11-acyl, C4-9-cycloalkanoyl, aryl, aralkyl, aroyl, hetaryl, hetaralkyl and hetaroyl, comprising a biotransformation of a compound of formula
wherein R1 is as defined above, wherein said biotransformation is carried out using a polypeptide having aldo-keto reductase activity or a microorganism containing same.