Process for preparation of 3-phenoxybenzyl
2-(4-alkoxyphenyl)-2-methylpropyl ethers
    7.
    发明授权
    Process for preparation of 3-phenoxybenzyl 2-(4-alkoxyphenyl)-2-methylpropyl ethers 失效
    2-(4-烷氧基苯基)-2-甲基丙基醚3-苯氧基苄酯的制备方法

    公开(公告)号:US4873373A

    公开(公告)日:1989-10-10

    申请号:US890143

    申请日:1986-07-16

    CPC分类号: C07C41/24

    摘要: Disclosed is a process for preparing 3-phenoxybenzyl 2-(4-alkoxyphenyl)-2-methylpropyl ethers represented by the following formula (I): ##STR1## wherein R stands for a lower alkyl group, and X.sub.1 and X.sub.2 stand for a hydrogen atom or fluorine atom,which comprises subjecting a 3-phenoxybenzyl 2-(4-alkoxy-3-halogenophenyl)-2-methylpropyl ether or 3-phenoxybenzyl-2-(4-alkoxy-3,5-dihalogenophenyl)-2-methylpropyl ether represented by the following formula (II): ##STR2## wherein R stands for a lower alkyl group, X.sub.1 and X.sub.2 stand for a hydrogen atom or fluorine atom, and Y.sub.1 and Y.sub.2 stand for a hydrogen atom, chlorine atom, bromine atom or iodine atom, with the proviso that at least one of Y.sub.1 and Y.sub.2 is a chlorine atom, bromine atom or iodine atom,to dechlorination, debromination or deiodination by hydrogenation, wherein the dechlorination, debromination or deiodination is carried out in the presence of a hydrogenation catalyst by using as a hydrogenative reducing agent a lower aliphatic alcohol and an alkali compound selected from the group comprising alkali metal hydroxides and alkaline earth metal hydroxides.According to this process, compounds of the formula (I) can be obtained in high yields with safety without using hydrogen.

    摘要翻译: PCT No.PCT / JP86 / 00198 Sec。 371日期:1986年7月16日 102(e)日期1986年7月16日PCT提交1986年4月18日PCT公布。 公开号WO86 / 06367 日期:1986年11月6日。公开是制备由下式(I)表示的2-(4-烷氧基苯基)-2-甲基丙基醚的3-苯氧基苄基的方法:其中R代表低级烷基 基团,X 1和X 2表示氢原子或氟原子,其包括使2-(4-烷氧基-3-卤代苯基)-2-甲基丙基醚或3-苯氧基苄基-2-(4-烷氧基-3-卤代苯基) 由下式(II)表示的3,5-二卤代苯基)-2-甲基丙基:其中R表示低级烷基,X 1和X 2表示氢原子或氟原子,Y 1和 Y2代表氢原子,氯原子,溴原子或碘原子,条件是Y1和Y2中的至少一个是氯原子,溴原子或碘原子,通过氢化脱氯,脱溴或脱碘,其中脱氯 通过使用氢还原剂,在氢化催化剂的存在下进行脱溴或脱碘 脂族醇和选自碱金属氢氧化物和碱土金属氢氧化物的碱的化合物。 根据该方法,可以在不使用氢气的情况下安全地以高产率获得式(I)化合物。

    Process for producing 3-phenoxybenzyl 2-(4-alkoxyphenyl)-2-methylpropyl
ethers
    9.
    发明授权
    Process for producing 3-phenoxybenzyl 2-(4-alkoxyphenyl)-2-methylpropyl ethers 失效
    2-(4-烷氧基苯基)-2-甲基丙基醚3-苯氧基苄基的制备方法

    公开(公告)号:US4542243A

    公开(公告)日:1985-09-17

    申请号:US540017

    申请日:1983-10-07

    CPC分类号: C07C41/24 C07C41/16 C07C41/30

    摘要: The present invention relates to a process for producing 3-phenoxybenzyl 2-(4-alkoxyphenyl)-2-methylpropyl ethers having excellent insecticidal and acaricidal activities which are represented by formula (IV): ##STR1## wherein R is a lower alkyl group and X.sub.1 and X.sub.2 are each a hydrogen or fluorine atom, which comprises reacting a 3-halogeno-4-alkoxyneophyl halide represented by the formula (I): ##STR2## wherein Y.sub.1 and Y.sub.2 are each a hydrogen, chlorine or bromine atom, at least one of them being a chlorine or bromine atom, R has the same meaning as above and X is a halogen atom, with a 3-phenoxybenzyl alcohol represented by the formula (II): ##STR3## wherein X.sub.1 and X.sub.2 have the same meaning as above, in the presence of a base to obtain a 3-phenoxybenzyl 2-(4-alkoxy-3-halogenophenyl)-2-methylpropyl ether represented by the formula (III): ##STR4## wherein Y.sub.1, Y.sub.2, R, X.sub.1 and X.sub.2 have the same meaning as above, and then subjecting the product to a hydrodehalogenation reaction, and relates to a process for producing a 3-halogeno-4-alkoxyneophyl halide represented by formula (I), which comprises reacting a 2-halogeno-1-alkoxybenzene represented by formula (V): ##STR5## wherein Y.sub.1 and Y.sub.2 are each a hydrogen, chlorine or bromine atom, at least one of them being a chlorine or bromine atom, and R represents a lower alkyl group, with a methallyl halide in the presence of an acid catalyst at -20.degree. to 50.degree. C.

    摘要翻译: 本发明涉及一种具有优异的杀虫和杀螨活性的2-(4-烷氧基苯基)-2-甲基丙醚的3-苯氧基苄基的方法,其由式(Ⅳ)表示:其中R为低级 烷基,X 1和X 2各自为氢或氟原子,其包括使由式(I)表示的3-卤代-4-烷氧基脱乙酰卤:其中Y 1和Y 2各自为氢,氯 或溴原子,其中至少一个为氯或溴原子,R具有与上述相同的含义,X为卤素原子,与式(II)表示的3-苯氧基苄醇: 其中X1和X2具有与上述相同的含义,在碱的存在下得到由式(III)表示的2-(4-烷氧基-3-卤代苯基)-2-甲基丙基3-苯氧基苄基: (III)其中Y1,Y2,R,X1和X2具有与上述相同的含义,然后使产物进行加氢脱卤反应, 涉及制备由式(I)表示的3-卤代-4-烷氧基脱乙酰卤的方法,该方法包括使由式(Ⅴ)表示的2-卤代-1-烷氧基苯:其中Y1和Y2 各自为氢,氯或溴原子,其中至少一个为氯或溴原子,R为低级烷基,在甲酸烯丙酯的卤化物存在下,在-20℃至50℃。