Process for preparing N-methylcarbamate of methylthioacetaldoxime
    4.
    发明授权
    Process for preparing N-methylcarbamate of methylthioacetaldoxime 失效
    制备甲硫基乙醛肟的N-甲基氨基甲酸酯的方法

    公开(公告)号:US4333882A

    公开(公告)日:1982-06-08

    申请号:US234842

    申请日:1981-02-17

    CPC分类号: C07C327/58

    摘要: A process is disclosed for preparing N-methylcarbamate of methylthioacetaldoxime, characterized in that an aqueous suspension of methylthioacetaldoxime is additioned, in one step only, with gaseous phosgene and aqueous methylamine in the presence of an inorganic alkaline base substantially at room temperature and pressure.The product obtained, known commercially as "Methomyl", is an important active principle in the field of insecticides.

    摘要翻译: 公开了一种制备甲基硫代乙醛肟的N-甲基氨基甲酸酯的方法,其特征在于在无机碱性碱存在下,基本上在室温和高压下,仅在一个步骤中仅加入甲基硫代乙醛肟的水性悬浮液与气体光气和甲胺水溶液。 获得的商品名为“甲氧基”,是杀虫剂领域的重要活性成分。

    Process for the preparation of substituted benzofuran derivatives
    6.
    发明授权
    Process for the preparation of substituted benzofuran derivatives 失效
    取代苯并呋喃衍生物的制备方法

    公开(公告)号:US5459161A

    公开(公告)日:1995-10-17

    申请号:US78293

    申请日:1993-06-25

    摘要: Substituted benzofuran derivatives of the formula (I): ##STR1## wherein one of R.sub.1 and R.sub.2 is hydrogen or halogen and the other is, independently, an amino group or a C.sub.2 -C.sub.4 alkanoyl amino group; R.sub.3 is hydrogen; a linear or branched C.sub.1 -C.sub.4 alkyl, C.sub.1 -C.sub.4 alkoxy or C.sub.2 -C.sub.4 alkoxycarbonyl group; halogen; or phenyl unsubstituted or substituted by a C.sub.1 -C.sub.4 alkyl group; A is a group --(CH.sub.2).sub.n -Het wherein Het is an optionally substituted heteromonocyclic or heterobicyclic ring containing one or two nitrogen atoms, and n is zero or an integer of 1 to 3; and the symbol ..... represents a single or double bond; may be prepared by a process comprising reacting a compound of formula II: ##STR2## in which L is a leaving group and R.sub.4 is hydrogen or a carboxy protecting group, with a compound of formula III;R'.sub.3 --C.dbd.C--R'.sub.3 IIIto obtain a compound of formula IV; ##STR3## which is then cyclized to obtain a compound of formula V; ##STR4## which is reacted with a compound of formula VI;H.sub.2 N--A VI.

    摘要翻译: PCT No.PCT / EP91 / 02512 Sec。 371日期:1993年6月25日 102(e)日期1993年6月25日PCT 1991年12月27日PCT PCT。 出版物WO92 / 12147 日本时间1992年7月23日。式(I)的取代苯并呋喃衍生物:其中R 1和R 2之一是氢或卤素,另一个独立地是氨基或C 2 -C 4烷酰基氨基; R3是氢; 直链或支链C 1 -C 4烷基,C 1 -C 4烷氧基或C 2 -C 4烷氧基羰基; 卤素; 或未被取代或被C 1 -C 4烷基取代的苯基; A是基团 - (CH 2)n -Het,其中Het是含有一个或两个氮原子的任选取代的杂单环或杂双环,且n为0或1至3的整数; 符号.....表示单键或双键; 可以通过包括使式II化合物:其中L是离去基团且R4是氢或羧基保护基的式II化合物与式III化合物反应来制备; R'3-C = C-R'3 III,得到式Ⅳ化合物; IV,然后将其环化以获得式V化合物; 其与式VI化合物反应; H2N-A VI。

    Process for preparing the mono-methallyl ether of pyrocatechin
    8.
    发明授权
    Process for preparing the mono-methallyl ether of pyrocatechin 失效
    制备邻苯二酚单甲基烯丙基醚的方法

    公开(公告)号:US4390733A

    公开(公告)日:1983-06-28

    申请号:US263598

    申请日:1981-05-14

    CPC分类号: C07C43/23

    摘要: The mono-methallyl ether of pyrocatechin of formula (I): ##STR1## is prepared by reacting pyrocatechin of formula (II): ##STR2## with a methallyl halide of formula (III): ##STR3## in a homogeneous dissolving medium, e.g., alcohols, aliphatic polyalcohols and monoethers thereof, or water, in the presence of an organic or inorganic base.The mono-methallyl ether of pyrocatechin is used as an intermediate for organic syntheses and, in particular for synthesizing the product of formula (IV); ##STR4## which is marketed under the tradename "Carbofuran" and is a compound which is the active principle in soil insecticides of different overall compositions which are available on the market.

    摘要翻译: 式(I)的焦儿子的单 - 甲代烯丙基醚:通过使式(II)的焦儿茶素:II(II)与式(III)的甲代烯丙基酯反应制备: III)在有机或无机碱的存在下在均匀的溶解介质中,例如醇,脂族多元醇和其单醚或水。 焦儿茶酚的单甲代烯丙基醚用作有机合成的中间体,特别是用于合成式(IV)的产物; (IV),以商品名“呋喃丹”销售,是市场上可获得的不同总成分的土壤杀虫剂的活性成分的化合物。