Synthesis of a 3,4-dihydroxy-1-cyclopentanylpurinone
    6.
    发明授权
    Synthesis of a 3,4-dihydroxy-1-cyclopentanylpurinone 失效
    3,4-二羟基-1-环戊基嘌呤酮的合成

    公开(公告)号:US5329008A

    公开(公告)日:1994-07-12

    申请号:US44339

    申请日:1993-04-07

    CPC分类号: C07D473/00

    摘要: Synthesis of the triol of the following formula (I) from an alcohol of the formula (IV): ##STR1## via steps including protecting and then cyanating the alcohol to yield a cyanide, isomerization of the double bond, hydrolysis followed by reduction of the cyanide back to an alcohol and cis-dihydroxylation of the double bond.

    摘要翻译: 通过步骤包括保护然后使醇氰化以产生氰化物,从式(IV)的醇中合成下式(I)的三醇: 双键,水解,然后将氰化物还原成醇,双键顺式 - 二羟基化。

    Kinetic resolution of pyridazinones using lipase
    8.
    发明授权
    Kinetic resolution of pyridazinones using lipase 失效
    使用脂肪酶的哒嗪酮的动力学拆分

    公开(公告)号:US5053338A

    公开(公告)日:1991-10-01

    申请号:US560941

    申请日:1990-07-20

    IPC分类号: C07D237/04

    CPC分类号: C07D237/04

    摘要: A kinetic resolution of pyridazinones of the following formula (A): ##STR1## where R.sup.1 is alkyl by enzymatic hydrolysis results in good optical purity of the phenolic product. This is significant considering the distance in the molecule (A) from the C-5 chiral center to the site of hydrolysis.

    摘要翻译: 下式(A)的哒嗪酮的动力学拆分:其中R1是通过酶水解的烷基导致酚产物的良好的光学纯度。 考虑到分子(A)从C-5手性中心到水解位点的距离是重要的。