Preparation of polyether polycarboxylic acids containing quaternary carbon atoms in the backbone
作者:Robert McCrindle、Alan J. McAlees
DOI:10.1039/p19810000741
日期:——
The addition of chloromethyl ethers (4a–c), (10a), and (11a) to 1-methoxy-2-methylprop-1-ene (5) is catalysed by mercury(II) chloride. Hydrolysis of the resulting chloro-ethers [e.g. (6a)] gives 3-alkoxy-2,2-dialkylpropanals [e.g. (7a)] which can be oxidised to the corresponding carboxylic acids [e.g. (8a)] with hydrogen peroxide in the presence of selenium dioxide as catalyst. Poly(alkoxyacetic) acids
DRUG-LIGAND CONJUGATES, SYNTHESIS THEREOF, AND INTERMEDIATES THERETO
申请人:Kane John
公开号:US20130131310A1
公开(公告)日:2013-05-23
The present invention relates to methods for synthesizing compounds of formula I or pharmaceutically acceptable salts thereof: (I) wherein each of X, Alk, and W are as defined and described herein.
[EN] POLYETHYLENE GLYCOL CONJUGATE DRUG SYNERGIST, PREPARATION METHOD THEREFOR, AND USE THEREOF<br/>[FR] AGENT SYNERGISTE DE MÉDICAMENT CONJUGUÉ AU POLYÉTHYLÈNE GLYCOL, SON PROCÉDÉ DE PRÉPARATION ET SON UTILISATION<br/>[ZH] 聚乙二醇偶联药物增效剂、其制备方法及用途