Process of preparing penicillamine
    12.
    发明授权
    Process of preparing penicillamine 失效
    制备青霉胺的方法

    公开(公告)号:US4028406A

    公开(公告)日:1977-06-07

    申请号:US657835

    申请日:1976-02-13

    IPC分类号: C07D277/06 C07C99/00

    CPC分类号: C07D277/06 Y10S426/807

    摘要: Improvements in the process of preparing penicillamine or a homolog thereof by reacting an .alpha.-carbon atom branched aldehyde, sulfur and ammonia to form a thiazoline-.DELTA..sup.3, reacting the thiazoline-.DELTA..sup.3 with anhydrous hydrogen cyanide to form a thiazolidine-4-carbonitrile, hydrolyzing the nitrile to form a mixture of the salt of the thiazolidine-4-carboxylic acid and ammonium salts, separating off the ammonium salts and hydrolytically decomposing the thiazolidine-4-carboxylic acid, wherein under the action of a mineral acid the thiazolidine-4-carbonitrile is in the first stage converted at low temperatures into the salt of the thiazolidine-4-carbonamide and then at higher temperatures converted into the salt of the thiazolidine-4-carboxylic acid.

    摘要翻译: 通过使α-碳原子支链醛,硫和氨反应形成噻唑啉-DTA 3,制备青霉胺或其同系物的方法的改进,使噻唑啉-DTA 3与无水氰化氢反应形成噻唑烷-4-腈 水解腈形成噻唑烷-4-羧酸盐和铵盐的混合物,分离出铵盐并水解分解噻唑烷-4-羧酸,其中在无机酸的作用下,噻唑烷-4-酮 4-甲腈在第一阶段在低温下转化成噻唑烷-4-碳酰胺的盐,然后在更高的温度下转化成噻唑烷-4-羧酸的盐。