Phase-Transfer Catalyzed Synthesis of Amides and Esters of Carboxylic Acids
作者:Zsuzsa M. Jászay、Imre Petneházy、László Töke
DOI:10.1055/s-1989-27380
日期:——
A convenient one-pot procedure is reported for the preparation of carboxamides and carboxylic acid esters from carboxylic acids and amines or alcohols, respectively. The carboxylic acids are activated by sulfonyl chlorides under solid-liquid phase-transfer conditions using solid potassium carbonate as base and a lipophilic quaternary ammonium salt as catalyst.
(EN) The invention concerns the use of alpha hydroxy carboxylic acid (AHA) derivatives as washing and/or conditioning agents for the skin and the hair. The invention also concerns novel AHA derivatives, compositions, in particular cosmetic and hair compositions containing them, and methods for preparing them.(FR) L'invention a pour objet l'utilisation de dérivés d'acides alpha hydroxy carboxyliques (AHA) en tant qu'agents de lavage et/ou de conditionnement de la peau et des cheveux. Elle concerne également de nouveaux dérivés d'AHA, les compositions, notamment cosmétiques et capillaires les contenant, et les procédés permettant leur préparation.
ZWITTERIONIC COMPOUNDS AND USE THEREOF
申请人:Herrwerth Sascha
公开号:US20090054521A1
公开(公告)日:2009-02-26
The present invention covers zwitterionic, non-surface-active compounds in the form of carboxymethylated, short-chain dialkylaminoalkylamides and use thereof as therapeutic agent.