Chemoenzymatic enantioselective synthesis of 3-hydroxy-2-pyrrolidinones and 3-hydroxy-2-piperidinones
摘要:
The enantioselective synthesis of 3-hydroxypyrrolidin-2-ones and 3-hydroxy piperidin-2-ones has been carried out in high enantiomeric excess employing immobilized lipase from Pseudomonas cepacia. (C) 2003 Elsevier Ltd. All rights reserved.
The present invention relates to novel nodulosporic acid derivatives, which are acaricidal, antiparasitic, insecticidal and anthelmintic agents.
本发明涉及一种新的结节孢酸衍生物,其具有杀螨、抗寄生虫、杀虫和驱虫作用。
Hair Processing Agent And Method For Permanent Waving Hair
申请人:Shibuya Akira
公开号:US20080085251A1
公开(公告)日:2008-04-10
Provided are hair processing agents capable of permanent waving hair even at a neutral to weakly acidic pH range that causes less irritation to the skin, and hair processing agents in which an unpleasant odor is masked. Hair processing agents contain at least one compound represented by the formula (2). Hair processing agents contain a compound of the formula (2) and at least one compound (ii) selected from thioglycolic acid, thiolactic acid, cysteine, acetylcysteine, cysteamine, acylcysteamine, salts thereof and ester derivatives thereof. Hair processing agents contain a compound of the formula (2), a surfactant and water, and are emulsified. Hair processing agents contain a compound of the formula (2) and a specific perfume. wherein X is a structure selected from —O—, —S—, —NH— and —NR
1
—; R
1
is an alkyl group of 1 to 6 carbon atoms; Y is an oxygen atom or a sulfur atom; in the formula (1), Z is a divalent organic residue having at least one mercapto group; in the formula (2), R is a divalent organic residue optionally having a mercapto group; and R
2
is a hydrogen atom or an alkyl group of 1 to 6 carbon atoms.
PRODUCTION METHOD OF HETEROCYCLIC MERCAPTO COMPOUND
申请人:Yorozuya Shinichi
公开号:US20090171095A1
公开(公告)日:2009-07-02
A method of the invention industrially produces heterocyclic mercapto compounds useful as raw materials or intermediates in the synthesis of medicaments or pesticides, or as permanent wave agent, with a high yield and high productivity using easily available starting materials. A heterocyclic mercapto compound represented by Formula (1) (wherein X represents any structure of —O—, —S—, —NH—, and —NR
1
—; R
1
represents any of an alkyl group, alkoxy group and alkoxyalkyl group each having 1 to 6 carbon atoms; Y represents an oxygen atom, a sulfur atom or —NR
2
—; R
2
represents a hydrogen atom or alkyl group having 1 to 6 carbon atoms; and Z
1
represents a divalent organic residue having at least one mercapto group) is produced by reacting a metal sulfide or a metal hydrosulfide with a compound represented by Formula (2) (wherein X and Y are as defined in Formula (1); and Z
2
represents a divalent organic residue having at least one halogen group) in the presence of a solvent at a pH of 7.0 to 11.0.