Amino protecting group
    6.
    发明授权
    Amino protecting group 失效
    氨基保护基

    公开(公告)号:US5239069A

    公开(公告)日:1993-08-24

    申请号:US918196

    申请日:1992-07-22

    申请人: Leland O. Weigel

    发明人: Leland O. Weigel

    摘要: The invention provides compounds of the formula ##STR1## wherein R* is a group of the formula ##STR2## wherein R and R.sup.0 are individually C.sub.1 -C.sub.6 alkyl groups or together form a ring consisting of the nitrogen atom to which they are attached and two to seven carbon atoms, said ring optionally substituted by one or more C.sub.1 -C.sub.6 alkyl and/or C.sub.1 -C.sub.6 substituted alkyl groups;Q and Q' are individually hydrogen, C.sub.1 -C.sub.6 alkyl, or when taken together form a divalent radical of the formula --CH.dbd.CH--CH.dbd.CH--;A is C.sub.1 -C.sub.6 alkyl, C.sub.1 -C.sub.6 substituted alkyl, --S--(C.sub.1 -C.sub.6 alkyl)CO.sub.2 R", or --CH.sub.2 (C.sub.1 -C.sub.6 alkyl) CO.sub.2 R" wherein R"is hydrogen or a carboxy-protecting group;A' is hydrogen, an amide-protecting group, or a group of the formula --CH.sub.2 CO.sub.2 R".

    摘要翻译: 本发明提供式IMA的化合物,其中R *是下式的基团:其中R和R0分别是C1-C6烷基或一起形成由它们连接的氮原子组成的环,两个 所述环任选地被一个或多个C 1 -C 6烷基和/或C 1 -C 6取代的烷基取代; Q和Q'分别为氢,C 1 -C 6烷基,或者一起形成式-CH = CH-CH = CH-的二价基团; A是C 1 -C 6烷基,C 1 -C 6取代的烷基,-S-(C 1 -C 6烷基)CO 2 R“或-CH 2(C 1 -C 6烷基)CO 2 R”,其中R“是氢或羧基保护基 ; A'是氢,酰胺保护基或式-CH 2 CO 2 R“的基团。

    Process and intermediates for chiral epoxides
    10.
    发明授权
    Process and intermediates for chiral epoxides 失效
    手性环氧化物的工艺和中间体

    公开(公告)号:US5183910A

    公开(公告)日:1993-02-02

    申请号:US770676

    申请日:1991-10-03

    申请人: Leland O. Weigel

    发明人: Leland O. Weigel

    摘要: Chiral epoxybutyrates are prepared in high yield from novel dihydro-3R-substituted sulfonyloxy-4R-hydroxy-2-(3H)furanones via based catalyzed alcoholysis. The product chiral epoxy butyrates are useful intermediates for the synthesis of 1-carba-1-dethia cephem antibiotics.

    摘要翻译: 通过基于催化的醇解由新的二氢-3R-取代的磺酰氧基-4R-羟基-2-(3H)呋喃酮制备手性环氧丁酸酯。 产品手性环氧丁酸酯是合成1-咔唑-1-脱氢头孢烯抗生素的有用中间体。