5ALPHA-CHOLESTAN-6-ONE DERIVATIVE
    14.
    发明专利

    公开(公告)号:JPS57163400A

    公开(公告)日:1982-10-07

    申请号:JP4906981

    申请日:1981-03-31

    申请人: SUNTORY LTD

    摘要: NEW MATERIAL:[ 22R,23R ]-B-Homo-7-oxa-5alpha-cholestan-6-one derivative of formulaI. EXAMPLE:[ 22R,23R ]-B-homo-7- oxa-5alpha-cholestan- 6-one-2alpha,3alpha,22,23-tetraol or 24-demethylbrassinolide. USE:Plant growth accelerator. PREPARATION:For example, 22,23-dehydrocholesterol of formula III is oxidized in the presence of N-methylmorpholine N-oxide to give[22R,23R]-22,23-dihydroxy-cholesterol of formula IV, which is made subsequently to react with p- toluenesulfonic acid and methanesulfonyl chloride to give the compound of formula V. The product is subjected to oxidation, desulfonation, oxidation and acylation to give a novel intermediate of formula IV,[22R,23R]-2alpha,3alpha-diacyloxy-5alpha-cholestan-6-one-22,23-diol 22,23-acetanilide. Finelly, the intermediate is oxidized and subjected to deprotection to give the compound of the example.

    15.
    发明专利
    失效

    公开(公告)号:JPS5411311B2

    公开(公告)日:1979-05-14

    申请号:JP9013473

    申请日:1973-08-11

    IPC分类号: C07D313/06 C07D311/94