Preparation of 3-(2'-oxyethyl)dihydro-2(3H)furanones
    14.
    发明授权
    Preparation of 3-(2'-oxyethyl)dihydro-2(3H)furanones 失效
    制备3-(2'-氧乙基)二氢-2(3H)呋喃酮

    公开(公告)号:US5350863A

    公开(公告)日:1994-09-27

    申请号:US120439

    申请日:1993-09-14

    IPC分类号: C07D307/33 C07D307/20

    CPC分类号: C07D307/33

    摘要: A process for preparing 3-(2'-oxyethyl)dihydro-2(3H)furanones of the general formula I ##STR1## where R.sup.1 is hydrogen or acetyl, by reacting ethylene oxide with acetoacetic acid esters of the general formula II ##STR2## where R.sup.2 is C.sub.1 -C.sub.4 -alkyl, which comprises carrying out the reaction in alcoholic solutions in the presence of alkali metal alkoxides at from 20.degree. to 100.degree. C. and from 1 to 20 bar, is described.

    摘要翻译: 制备通式Ⅰ的3-(2'-氧乙基)二氢-2(3H)呋喃酮的方法,其中R1是氢或乙酰基,通过使环氧乙烷与通式II的乙酰乙酸酯反应 其中R 2是C 1 -C 4 - 烷基,其包括在20至100℃和1至20巴的碱金属醇盐存在下,在醇溶液中进行反应。

    Carboxylic acid derivatives
    20.
    发明授权
    Carboxylic acid derivatives 失效
    羧酸衍生物

    公开(公告)号:US5085685A

    公开(公告)日:1992-02-04

    申请号:US566536

    申请日:1990-08-13

    摘要: Carboxylic acid derivatives of the general formula I ##STR1## where R.sup.1 and R.sup.2 are each C.sub.1 -C.sub.4 -alkyl, C.sub.1 -C.sub.4 -haloalkyl, C.sub.1 -C.sub.4 -alkoxy, C.sub.1 -C.sub.4 -haloalkoxy and/or C.sub.1 -C.sub.4 -alkylthio;R.sup.3 is hydrogen, hydroxyl, cyano, nitro, formyl, halogen, unsubstituted or substituted amino, C.sub.1 -C.sub.4 -alkyl, C.sub.1 -C.sub.4 -alkoxy, C.sub.3 -C.sub.6 -alkenyl, C.sub.3 -C.sub.6 -alkenyloxy, C.sub.3 -C.sub.6 -alkynyl or C.sub.3 -C.sub.6 -alkynyloxy;R.sup.4 is hydrogen or C.sub.1 -C.sub.4 -alkyl;R.sup.5 is unsubstituted or substituted five-membered hetaryl or isoxazolinyl or --CR.sup.6 .dbd.NOR.sup.7 ;R.sup.6 is hydrogen or unsubstituted or substituted C.sub.1 -C.sub.4 -alkyl, C.sub.3 -C.sub.8 -cycloalkyl or phenyl;R.sup.7 is unsubstituted or substituted C.sub.1 -C.sub.4 -alkyl, C.sub.3 -C.sub.6 -alkenyl, C.sub.3 -C.sub.8 -cycloalkyl or phenyl;A is oxygen or sulfur;X is nitrogen or methine .dbd.CR.sup.8 --;R.sup.8 is one of the radicals R.sup.3, or R.sup.8 and R.sup.3 together form unsubstituted or substituted 1,3-butadiene-1,4-yl or aza-1,3-butadiene-1,4-yl, andY and Z are each nitrogen or methine .dbd.CH--, their preparation and agents containing them.

    摘要翻译: 其中R 1和R 2各自为C 1 -C 4 - 烷基,C 1 -C 4 - 卤代烷基,C 1 -C 4 - 烷氧基,C 1 -C 4 - 卤代烷氧基和/或C 1 -C 4 - 烷硫基的通式I的羧酸衍生物; R3是氢,羟基,氰基,硝基,甲酰基,卤素,未取代或取代的氨基,C1-C4-烷基,C1-C4-烷氧基,C3-C6-烯基,C3-C6-烯氧基,C3-C6-炔基或C3 -C 6 - 炔氧基; R4是氢或C1-C4-烷基; R5是未取代的或取代的五元杂芳基或异恶唑啉基或-CR 6 = NOR 7; R6是氢或未取代或取代的C1-C4-烷基,C3-C8-环烷基或苯基; R 7为未取代或取代的C 1 -C 4 - 烷基,C 3 -C 6 - 烯基,C 3 -C 8 - 环烷基或苯基; A是氧或硫; X是氮或次甲基= CR8-; R8是基团R3之一,或R8和R3一起形成未取代或取代的1,3-丁二烯-1,4-基或氮杂-1,3-丁二烯-1,4-基,Y和Z各自为氮 或次甲基= CH-,它们的制备物和含有它们的试剂。