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):
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.
Alkylation of acetals using manganate–BF3·OEt2 mixed reagent
作者:Makoto Hojo、Nobuo Ushioda、Akira Hosomi
DOI:10.1016/j.tetlet.2004.04.050
日期:2004.5
ether converted acetals to alkylation products, where an alkoxy group of acetals was substituted by the alkyl group of manganese reagent used. Ketals also reacted with the `mixed reagent' to afford the corresponding alkylation products in high yield. α-Alkoxy-substituted cyclic ethers and acetoxy-substituted cyclic ethers were selectively converted to ring-opening alkylation products and α-alkyl-substituted
仅通过将两种试剂在醚转化的缩醛中搅拌而预先制备的“ R 3 MnMgBr”和BF 3 ·OEt 2的混合物,其中缩醛的烷氧基被所用的锰试剂的烷基取代。缩酮还与“混合试剂”反应,以高收率提供相应的烷基化产物。将α-烷氧基取代的环状醚和乙酰氧基取代的环状醚分别选择性地转化为开环烷基化产物和α-烷基取代的环状醚。
Synthesis of Geminal Bisperoxides by Acid-Catalyzed Reaction of Acetals and Enol Ethers with <i>tert</i>-Butyl Hydroperoxide
A new efficient procedure was developed for the synthesis of geminal bisperoxides by reaction of ketals and enol ethers with tert-butylhydroperoxide catalyzed by protic or Lewis acids.
A facile preparation of methyl enol ethers from acetals and ketals using trimethylsilyl iodide
作者:R.D. Miller、D.R. McKean
DOI:10.1016/s0040-4039(00)86821-5
日期:1982.1
Acetals and ketals are converted in high yields to the corresponding methyl vinyl ethers by treatment with trimethylsilyl iodide in the presence of hexamethyldisilazane at room temperature or below.