Method of preparing stereospecific nitroaldols
    12.
    发明授权
    Method of preparing stereospecific nitroaldols 失效
    制备立体特异性硝基醛的方法

    公开(公告)号:US4933505A

    公开(公告)日:1990-06-12

    申请号:US229009

    申请日:1988-08-05

    CPC分类号: C07D309/12 C07C201/12

    摘要: A method of controlling the diastereoselectivity of the nitroaldol reaction by the use of titanium, zirconium and aluminum based Lewis acids is disclosed. In a preferred embodiment, the reaction of lithium nitronate anion with aldehydes in THF/CH.sub.2 Cl.sub.2 at reduced temperature in the presence of isopropoxy titanium trichloride (TiCl.sub.3 (OPr.sup.i)) yields nitro alcohols enriched in the erythro diastereomer. Erythro-threo ratios of 11.2:1-3.4:1 for aromatic aldehydes and 3.8:1-1:1 for aliphatic aldehydes are typically obtained.

    摘要翻译: 公开了通过使用钛,锆和铝的路易斯酸来控制硝基醛醇反应的非对映选择性的方法。 在一个优选的实施方案中,在异丙氧基三氯化钛(TiCl 3(OPri))存在下,在降低的温度下,在硝酸锂阴离子与醛在THF / CH 2 Cl 2中的反应产生富含赤式非对映异构体的硝基醇。 通常可以获得芳族醛的11.2:1-3.4:1和脂肪醛的3.8:1-1:1的红外 - 苏比。

    Compounds and method for preparing 3-methylcephams
    14.
    发明授权
    Compounds and method for preparing 3-methylcephams 失效
    化合物和制备3-甲基脑炎的方法

    公开(公告)号:US06908996B2

    公开(公告)日:2005-06-21

    申请号:US10706683

    申请日:2003-11-12

    摘要: The present invention relates to novel intermediates for the preparation of 3-methylenecephams of the formula IIA. wherein: R is a carboxylic acid protecting group; R1 is a group of the formula; R10 is C1-C6 alkyl, C1-C6 polyfluoroalkyl, C3-C6 cycloalkyl, adamantyl, phenyl, substituted phenyl, phenyl(C1-C3 alkyl), diphenylmethyl, or substituted phenyl(C1-C3 alkyl), or a group of the formula Z is solid polymer support; and Z1 is one or two groups independently selected from the group consisting of hydrogen, halo, hydroxy, protected hydroxy, nitro, cyano, trifluoromethyl, C1-C4 alkyl, and C1-C4 alkoxy.

    摘要翻译: 本发明涉及用于制备式IIA的3-亚甲基头孢的新型中间体。 其中:R是羧酸保护基; R 1是下式的基团: R 10是C 1 -C 6烷基,C 1 -C 6烷基,C 1 -C 6烷基,C 1 -C 6烷基,C 1 -C 6烷基, 多氟烷基,C 3 -C 6环烷基,金刚烷基,苯基,取代的苯基,苯基(C 1 -C 3 - 烷基),二苯基甲基或取代的苯基(C 1 -C 3烷基)或式Z的基团是固体聚合物载体; 和Z 1是独立地选自氢,卤素,羟基,保护的羟基,硝基,氰基,三氟甲基,C 1 -C 3的一个或两个基团 C 1-4烷基和C 1 -C 4烷氧基。

    Heteroatom-functionalized porphyrazines and multimetallic complexes and
polymers derived therefrom
    15.
    发明授权
    Heteroatom-functionalized porphyrazines and multimetallic complexes and polymers derived therefrom 失效
    杂原子官能化的四氮杂卟啉和多金属络合物及其衍生的聚合物

    公开(公告)号:US5675001A

    公开(公告)日:1997-10-07

    申请号:US403302

    申请日:1995-03-14

    摘要: Porphyrazine compounds having moieties substituted at the eight peripheral .beta.-pyrrole positions are disclosed. The porphyrazine compounds have the general structural formula: ##STR1## wherein M is H.sub.2 or a metal capable of complexing with the pyrrole nitrogen atoms, and A, B, C and D are independently selected from the group consisting of a thio moiety, an amino moiety, an oxo moiety, a phospho moiety, a seleno moiety, a telluro moiety and a non-coordinating moiety, like a hydrocarbon moiety, with the proviso that not all of A, B, C and D are a thio moiety and that not all of A, B, C, and D are a hydrocarbon moiety. The porphyrazine compounds, depending on the identity of A, B, C and D, are capable of complexing one to four metal ions to the periphery of the porphyrazine to form a multimetallic porphyrazine. Multimetallic porphyrazine compounds can be linked by the peripherally-complexed metal ions to form a linear, i.e., ribbon, polymer or a two-dimension, i.e., sheet polymer. The porphyrazine compounds, and the multimetallic complexes and polymers derived therefrom, are useful in, or as, magnet materials, molecular metal conductors, pharmaceuticals, imaging agents, and dyes.

    摘要翻译: 公开了在八个外围β-吡咯位置取代部分的四氮杂卟啉化合物。 四氮杂卟啉化合物具有以下通式结构式:其中M为H 2或能与吡咯氮原子络合的金属,A,B,C和D独立地选自硫基部分,氨基 部分,氧代部分,磷酸部分,硒部分,尾流部分和非配位部分,如烃部分,条件是不是全部A,B,C和D都是硫基部分,而不是全部 所有A,B,C和D都是烃部分。 取决于A,B,C和D的同一性,四氮杂卟啉化合物能够将1-4个金属离子络合到四氮杂卟啉的周围以形成多金属四氮杂卟啉。 多金属四氮杂卟啉化合物可以通过周边配合的金属离子连接以形成线性,即带状聚合物或二维即片状聚合物。 四氮杂卟啉化合物及其衍生的多金属络合物和聚合物可用于或作为磁体材料,分子金属导体,药物,成像剂和染料。