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
氯化汞(II)催化将氯甲基醚(4a-c),(10a)和(11a)加到1-甲氧基-2-甲基丙-1-烯(5 )中。所得氯醚的水解[例如。(6a)]得到3-烷氧基-2,2-二烷基丙醛[例如。(7a)]可以被氧化成相应的羧酸[例如。(8a)]在二氧化硒存在下用过氧化氢作为催化剂。聚(alkoxyacetic)氨基酸已经被通过与醇盐反应得到NN -dialkylchloroacetamides接着水解。因此,酸(12a–c)分别从2,2-二甲基丙烷-1,3-二醇,2-羟甲基-2-甲基丙烷-1,3-二醇和季戊四醇获得。