Polycarbonate of cycloalkylidene bisphenol
    5.
    发明授权
    Polycarbonate of cycloalkylidene bisphenol 失效
    环亚烷基双酚的聚碳酸酯

    公开(公告)号:US5010163A

    公开(公告)日:1991-04-23

    申请号:US450604

    申请日:1989-12-13

    IPC分类号: C08G64/00 C08G64/06

    CPC分类号: C08G64/06

    摘要: Thermoplastic aromatic polycarbonates having average molecular weight Mw of at least 10,000 which contain bifunctional carbonate structural units corresponding to formula (I) ##STR1## in which R.sup.1, R.sup.2, R.sup.3 and R.sup.4 independently of one another represent hydrogen, a C.sub.1 -C.sub.12 -hydrocarbon, halogen,m is 2 or 3 andX represents hydrogen or a C.sub.6 -C.sub.12 hydrocarbon, at least one substituent X being a C.sub.6 -C.sub.12 hydrocarbon radical,in quantities of from 100 to 1 mol-% based on the total quantity of difunctional carbonate structural units in the polycarbonate.

    摘要翻译: 具有至少10,000的平均分子量& Mw和Mw的热塑性芳族聚碳酸酯,其含有对应于式(I)的双官能碳酸酯结构单元,其中R 1,R 2,R 3和R 4彼此独立地表示氢,C1- C 12烃,卤素,m为2或3,X表示氢或C 6 -C 12烃,至少一个取代基X为C 6 -C 12烃基,其量为100至1摩尔%,基于总量 的聚碳酸酯中的双官能碳酸酯结构单元。

    Chloropyridinium chlorides and process for their preparation
    10.
    发明授权
    Chloropyridinium chlorides and process for their preparation 失效
    氯吡啶鎓氯化物及其制备方法

    公开(公告)号:US5541332A

    公开(公告)日:1996-07-30

    申请号:US368179

    申请日:1995-01-04

    IPC分类号: C07D213/20 C07D213/61

    CPC分类号: C07D213/61

    摘要: A process for the preparation of a chloropyridine of the formula ##STR1## which comprises reacting an enamide of the formula ##STR2## with a chlorinating agent in the presence of a di-substituted formamide ##STR3## in which R.sup.4 and R.sup.5 each individually is alkyl or cycloalkyl or together are alkanediyl, at a temperature between about -30.degree. C. and 100.degree. C., thereby to produce a compound of the formula ##STR4## and subjecting said compound to thermal cleavage. Compounds I are novel. Compounds IV are known intermediates for agrochemicals and pharmaceuticals.

    摘要翻译: (IV)的氯吡啶的制备方法,其包括在二取代的甲酰胺(III)的存在下使式(I)的酰胺与氯化剂反应, 其中R 4和R 5各自独立地是烷基或环烷基或一起是烷二基,在约-30℃至100℃的温度下,从而产生下式化合物(I),并使所述化合物 热裂解。 化合物I是新的。 化合物IV是农药和药物的已知中间体。