Benzyl cyanoacetals
    8.
    发明授权
    Benzyl cyanoacetals 失效
    苄基氰缩醛

    公开(公告)号:US4144263A

    公开(公告)日:1979-03-13

    申请号:US804537

    申请日:1977-06-08

    摘要: Benzyl cyanoacetals of formula: ##STR1## wherein R.sup.1, R.sup.2 and R.sup.3 are the same or different and each is a halogen or a hydrogen atom, an alkoxy group, an alkyl group, or a dialkylamino group; R.sup.4 is an alkoxycarbonyl group, or an aldehyde group;And R.sup.5 is an alkyl group; the alkyl or alkoxy groups each having from 1 to 4 carbon atoms, and their use as intermediates in the preparation of antibacterial 2,4-diamino-5-benzylpyrimidines. They are prepared from a reaction between an orthoester and an .alpha.-substituted-.beta.-benzylpropionitrile and then the resulting cyanoacetal is converted to the benzyl-pyrimidine by reaction with guanidine.

    摘要翻译: 苄基氰基缩醛,其结构式如下:其中R 1,R 2和R 3相同或不同,各自为卤素或氢原子,烷氧基,烷基或二烷基氨基; R4是烷氧基羰基或醛基; 且R 5为烷基; 各自具有1至4个碳原子的烷基或烷氧基,以及它们在制备抗菌2,4-二氨基-5-苄基嘧啶中的用途。 它们由原酸酯和α-取代的β-苄基丙腈之间的反应制备,然后通过与胍反应将所得的氰基缩醛转化为苄基 - 嘧啶。