"> Process for preparation of 4
    5.
    发明授权
    Process for preparation of 4"-deoxyerythromycins A and B 失效
    4“ - 脱氧红霉素A和B的制备方法

    公开(公告)号:US5760198A

    公开(公告)日:1998-06-02

    申请号:US785451

    申请日:1997-01-17

    IPC分类号: C07H17/08 C07H1/00

    CPC分类号: C07H17/08

    摘要: A process for the preparation of 4"-deoxyerythromycins, having the formula: ##STR1## wherein R is H or OH, and R.sup.1 is H or loweralkyl by treatment of the 2'-O-acetyl-4"-imidazolylthionocarbonyl-erythromycin starting material with the radical initiator 4,4'-azobis-(4-cyanovaleric acid), H.sub.3 PO.sub.2 and an organic base in a water-miscible solvent and optionally eliminating the 2'-O-acetyl group. In a preferred embodiment, the water-miscible solvent is an alcohol and the deoxygenation and deacetylation is carried out in one step.

    摘要翻译: 一种制备4'-脱氧红霉素的方法,具有下式:其中R为H或OH,R1为H或低级烷基,通过处理2'-O-乙酰基-4“ - 咪唑硫代羰基 - 红霉素 起始材料与自由基引发剂4,4'-偶氮双(4-氰基戊酸),H 3 PO 2和有机碱在水混溶性溶剂中并任选除去2'-O-乙酰基。 在优选的实施方案中,水混溶性溶剂是醇,脱氧和脱乙酰化在一个步骤中进行。

    Hypophosphite deoxygenation reactions in the synthesis of erythromycin
derivatives
    7.
    发明授权
    Hypophosphite deoxygenation reactions in the synthesis of erythromycin derivatives 失效
    次磷酸脱氧反应合成红霉素衍生物

    公开(公告)号:US06040440A

    公开(公告)日:2000-03-21

    申请号:US36186

    申请日:1998-03-06

    IPC分类号: C07H17/08 C07H1/03

    CPC分类号: C07H17/08

    摘要: A process for the preparation of 4"-deoxyerythromycins, having the formula: ##STR1## wherein R is H or OH, R.sup.1 is H or loweralkyl, and R.sup.2 is H or CH.sub.3 by treatment of the starting material, 2'-O-acetyl-4"-imidazolylthiocarbamoyl-erythromycin, with a hypophosphite reagent, in a water-miscible protic solvent optionally comprising a phase transfer agent. In a preferred embodiment, the water-miscible solvent is an alcohol and the starting material is reacted with sodium hypophosphite, ACVA and tetra-n-butylammonium hydroxide.

    摘要翻译: 一种制备4'-脱氧红霉素的方法,具有下式:其中R是H或OH,R1是H或低级烷基,R2是H或CH3,通过处理原料2'-O-乙酰基-4 “ - 咪唑基硫代氨基甲酰基 - 红霉素与次亚磷酸酯试剂在任选包含相转移剂的水混溶性质子溶剂中。 在优选的实施方案中,水混溶性溶剂是醇,起始原料与次磷酸钠,ACVA和氢氧化四正丁基铵反应。