Process for the preparation of substituted difluorobenzo-1,3-dioxoles
    1.
    发明授权
    Process for the preparation of substituted difluorobenzo-1,3-dioxoles 失效
    制备取代的二氟苯-1,3-二氧杂环戊烯的方法

    公开(公告)号:US5496848A

    公开(公告)日:1996-03-05

    申请号:US440171

    申请日:1995-05-12

    摘要: The reaction of 2,2-difluorobenzo-1,3-dioxole with (a) an alkali metal or an alkali metal compound and then (b) a compound R.sup.1 -Z.sup.1 in which Z.sup.1 is a leaving group, or with an aldehyde produces compounds of formula I ##STR1## wherein R.sup.1 is --OH, --SH, --CHO, --CN, --COOH, --B(OH).sub.2, --COX, with X being Cl or Br, or is --COOR.sup.2, --SIR.sup.2.sub.3 or --B(OR.sup.2).sub.2, with R.sup.2 being a C.sub.1 -C.sub.12 alcohol moiety without the hydroxy group, wherein R.sup.1 is further --C.sub.n H.sub.2n COOR.sup.2, with n being an integer from 1 to 4, or linear or branched C.sub.1 -C.sub.12 hydroxyalkyl which is unsubstituted or is substituted by --F, --CN, C.sub.1 -C.sub.6 alkoxy, phenyl, fluorophenyl, C.sub.1 -C.sub.4 alkoxy-phenyl, C.sub.1 -C.sub.4 alkylthio-phenyl, C.sub.1 -C.sub.4 alkyl-phenyl, C.sub.1 -C.sub.4 fluoroalkyl-phenyl, nitrophenyl or by cyanophenyl, or wherein R.sup.1 is a benzyl alcohol which is unsubstituted or is substituted by F, C.sub.1 -C.sub.4 alkoxy, C.sub.1 -C.sub.4 alkylthio, C.sub.1 -C.sub.4 alkyl, C.sub.1 -C.sub.4 fluoroalkyl, nitro or by cyano, or is C.sub.1 -C.sub.12 acyl, or wherein R.sup. 1 is a radical of formula II ##STR2## wherein R.sup.5 is --CN, --CF.sub.3, --COOR.sup.2, --CONH.sup.2, --CO--NHR.sup.2 or --CONR.sup.2.sub.2, R.sup.3 and R.sup.4 are a direct bond or each is H, or R.sup.3 is H and R.sup.4 independently has the meanings of R.sup.5, or R.sup.3 and R.sup.4 together are --CH.sub.2 --NR.sup.6 --CH.sub.2 --, --CH.sub.2 --NR.sup.6 --CO-- or --CO--NR.sup.6 --CO-- wherein R.sup.6 is the radical of a removable protecting group, or wherein further R.sup.1 is a radical of formula III ##STR3## Insecticides or fungicides can be prepared from the compounds of formula I.3-(2,2-difluorobenzodioxol-4-yl)-4-cyanopyrrole can be prepared by reacting 4-metallo-2,2-difluorobenzodioxole (III) with an unsaturated nitrile and then with a sulfonylmethyl isocyanide in a one-pot process. The compounds III are novel intermediates.

    摘要翻译: 2,2-二氟苯-1,3-二氧杂环戊烯与(a)碱金属或碱金属化合物反应,然后(b)其中Z 1为离去基团的化合物R1-Z1或与醛反应生成化合物 其中R 1是-OH,-SH,-CHO,-CN,-COOH,-B(OH)2,-COX,X是Cl或Br,或者是-COOR 2, - SIR 23或-B(OR 2)2,其中R 2是没有羟基的C 1 -C 12醇部分,其中R 1还是-C n H 2n NOR 2,n是1至4的整数,或未被取代的直链或支链C 1 -C 12羟基烷基 被-F,-CN,C 1 -C 6烷氧基,苯基,氟苯基,C 1 -C 4烷氧基 - 苯基,C 1 -C 4烷硫基 - 苯基,C 1 -C 4烷基 - 苯基,C 1 -C 4氟烷基 - 苯基,硝基苯基或氰基苯基取代,或其中R 1 未被取代或被F,C 1 -C 4烷氧基,C 1 -C 4烷硫基,C 1 -C 4烷基,C 1 -C 4氟烷基,硝基或氰基取代的苄醇或C 1 -C 12酰基,或其中R 1是式II的基团, (II)其中R5是-CN,-CF3,-COOR2,-CONH2,-CO-N HR 2或-CONR 22,R 3和R 4是直接键,或者各自是H,或者R 3是H,R 4独立地具有R 5的定义,或者R 3和R 4一起是-CH 2 -NR 6 -CH 2 - , - CH 2 -NR 6 -CO - 或-CO-NR6-CO-,其中R6是可除去的保护基团的基团,或其中R 1是式III的基团。(III)杀虫剂或杀真菌剂可以由式I化合物制备。 - (2,2-二氟苯并二氧杂环戊烯-4-基)-4-氰基吡咯可以通过4-金属-2,2-二氟苯并间二氧杂环戊烯(III)与不饱和腈然后与一种磺酰基甲基异氰化物反应来制备。 化合物III是新的中间体。