Method for Producing 2,5-Dimethylphenyl Acetic Acid
    5.
    发明申请
    Method for Producing 2,5-Dimethylphenyl Acetic Acid 失效
    生产2,5-二甲基苯乙酸的方法

    公开(公告)号:US20080234501A1

    公开(公告)日:2008-09-25

    申请号:US10586491

    申请日:2005-01-22

    申请人: Thomas Himmler

    发明人: Thomas Himmler

    摘要: The invention relates to a method for preparing 2,5-dimethylphenylacetic acid by converting p-xylene with chloroacetyl chloride into 2-chloro-1-(2,5-dimethylphenyl)ethanone, which is reacted with the compound of the formula (II) to give the compound of the formula (III), which is then rearranged to give a mixture of the compounds (IV) and (V), which is then hydrolyzed to 2,5-dimethylphenylacetic acid.

    摘要翻译: 本发明涉及通过将对二甲苯与氯乙酰氯转化成2-氯-1-(2,5-二甲基苯基)乙酮,与式(II)化合物反应制备2,5-二甲基苯乙酸的方法, 得到式(III)的化合物,然后将其重排,得到化合物(Ⅳ)和(Ⅴ)的混合物,然后将其水解成2,5-二甲基苯基乙酸。

    2-Aroylcyclohexanediones, their preparation and their use as herbicides
or plant growth-regulating agents

    公开(公告)号:US6040274A

    公开(公告)日:2000-03-21

    申请号:US809100

    申请日:1997-03-18

    摘要: 2- Aroylcyclohexanediones I ##STR1## where X, Y=O or S;Ar=phenyl or heteroaryl in each case having 1-4 substituents: halogen, cyano, nitro, --N.dbd.N--Ph, C.sub.1 -C.sub.4 -alkoxycarbonyl, --N(R.sup.9)--COR.sup.10, --N(R.sup.9)--SO.sub.2 --R.sup.11, --SO.sub.2 --N(R.sup.9)R.sup.10, --S(O).sub.m --R.sup.8 or opt. subst. C.sub.1 -C.sub.4 -alkyl, C.sub.1 -C.sub.4 -alkoxy, C.sub.1 -C.sub.4 -haloalkyl or C.sub.1 -C.sub.4 -haloalkoxy;two adjacent C atoms of the phenyl or heteroaryl ring can also be bridged by means of a chain --C(R.sup.12).dbd.C(R.sup.13)--C(R.sup.14).dbd.C(R.sup.15)--, --Z.sup.1 --C(R.sup.12).dbd.N--, --Z.sup.1 --N.dbd.C(R.sup.12)--, --Z.sub.1 --C(R.sup.12).dbd.C(R.sup.13)--, --Z.sup.1 --C(R.sup.12).dbd.C(R.sup.13)--C(R.sup.14,R.sup.15)--, --Z.sup.1 --C (R.sup.12,R.sup.13)--C(R.sup.14,R.sup.15)--, --Z.sup.1 --C(R.sup.12,R.sup.13)--C(R.sup.14 R.sup.15)--Z.sup.2 --, --C(R.sup.12,R.sup.13)--Z.sup.1 --C(R.sup.14,R.sup.15)--C(R.sup.16,R.sup.17)--, --Z.sup.1 --N(R.sup.20)--Z.sup.2 --, --Z.sup.1 --Z.sup.2 --N(R.sup.20)--, --Z.sup.1 --C(R.sup.12,R.sup.13)--Z.sup.2 --N(R.sup.20)--, --Z.sup.1 --N(R.sup.20)--Z.sup.2 --N(R.sup.21)--, --N(R.sup.21)--Z.sup.1 --Z.sup.2 --, --N(R.sup.20)--Z.sup.1 --N.dbd.C(R.sup.12)--, --Z.sup.1 --C(R.sup.12,R.sup.13)--C(.dbd.NOR.sup.22)--, --Z.sup.1 --C(R.sup.12,R.sup.13)--C(R.sup.14,R.sup.15)--C(.dbd.NOR.sup.22)-- or Z.sup.1 --Z.sup.2 --Z.sup.1 ;(Z.sup.1, Z.sup.2 =--O--, --S--, --SO--, --SO.sub.2 --, --CO--, --C(R.sup.18,R.sup.19)-- or --N(R.sup.20)--;R.sup.12, R.sup.19 =H, OH, halogen, C.sub.1 -C.sub.4 alkyl, C.sub.1 -C.sub.4 -alkoxy, C.sub.1 -C.sub.4 -alkylthio, C.sub.1 -C.sub.4 -alkylamino, di-(C.sub.1 -C.sub.4 -alkyl)amino or phenyl;R.sup.20, R.sup.21 =H, C.sub.1 -C.sub.4 -alkyl, C.sub.1 -C.sub.4 -alkoxy, C.sub.1 -C.sub.4 -alkylcarbonyl, phenyl or benzoyl;R.sup.22 =H, C.sub.1 -C.sub.4 -alkyl, allyl or phenyl;Ph=phenyl, which can carry 1-3 substituents: halogen, cyano, nitro, --S(O).sub.n --R.sup.23, C.sub.1 -C.sub.4 -alkoxycarbonyl, --SO.sub.2 --N(R.sup.24)R.sup.25, --N(R.sup.24)--COR.sup.25, --N(R.sup.24)--SO.sub.2 R.sup.26 or opt. subst. C.sub.1 -C.sub.4 -alkyl, C.sub.1 -C.sub.4 -alkoxy, C.sub.1 -C.sub.4 -haloalkyl or C.sub.1 -C.sub.4 -haloalkoxy;m, n=0-2;R.sup.8, R.sup.23 =opt. subst. C.sub.1 -C.sub.4 -alkyl or C.sub.1 -C.sub.4 -haloalkyl;R.sup.9,R.sup.10,R.sup.24,R.sup.25 =H, C.sub.1 -C.sub.4 -alkyl, C.sub.1 -C.sub.4 -haloalkyl or opt. subst. phenyl;R.sup.11, R.sup.26 =opt. subst. C.sub.1 -C.sub.4 -alkyl or C.sub.1 -C.sub.4 -haloalkyl)R.sup.1,R.sup.2,R.sup.3,R.sup.4 =hydrogen or C.sub.1 -C.sub.4 -alkyl;R.sup.5 =H, C.sub.1 -C.sub.4 -alkyl or C.sub.1 -C.sub.4 -alkoxycarbonyl;R.sup.6, R.sup.7 =C.sub.1 -C.sub.4 -alkyl, benzyl or together are an opt. subst. ethylene or propylene chain;excluding 2-(4-chloro-2-nitrobenzoyl)-5-dimethoxymethyl-5-methylcyclohexane-1,3-dione,and the salts of I and esters of I with acids.Use: herbicides; growth regulators.

    Process for manufacturing cyclocarbonates using a silver salt catalyst
    7.
    发明授权
    Process for manufacturing cyclocarbonates using a silver salt catalyst 失效
    使用银盐催化剂制造环状碳酸盐的方法

    公开(公告)号:US5817838A

    公开(公告)日:1998-10-06

    申请号:US946844

    申请日:1997-10-08

    CPC分类号: C07D317/72 C07D317/36

    摘要: A process for the manufacture of 4,4-disubstituted 5-methylene-1,3-dioxolan-2-ones ("cyclocarbonates") of the formula: ##STR1## wherein R.sup.1 and R.sup.2 each independently signify a saturated or olefinically-unsaturated aliphatic group or an aromatic group, or R.sup.1 and R.sup.2 together form tetra- or pentamethylene, by reacting a corresponding 3,3-disubstituted prop-1-yn-3-ol of the formula HC.tbd.C--C(R.sup.1)(R.sup.2)--OH (II) with carbon dioxide in the presence of a quaternary ammonium or phosphonium salt as the catalyst comprises using a silver salt as a further catalyst. An alkali metal or quaternary ammonium or phosphonium salt of a carboxylic acid can also be used to increase the catalytic performance of the silver salt catalyst. Moreover, the addition of triphenylphosphine serves to accelerate the reaction to some extent. The silver salts catalyze this process significantly better than the previously utilized copper salts. Advantageously, the process uses much smaller amounts of catalyst, significantly shortens reaction times, and mandates less drastic reaction conditions. Cyclocarbonates produced by this process are valuable intermediates for the production of polymerizates and other useful substances, such as dyestuffs and carotenoids.

    摘要翻译: 制备下式的4,4-二取代的5-亚甲基-1,3-二氧戊环-2-酮(“环状碳酸酯”)的方法,其中R 1和R 2各自独立地表示饱和或不饱和的 脂族基团或芳族基团,或者R 1和R 2一起形成四或五亚甲基,通过使式HCB 3 CC(R 1)(R 2)-OH的相应的3,3-二取代的丙-1-炔-3-醇 (II)与作为催化剂的季铵盐或鏻盐存在下的二氧化碳包括使用银盐作为另外的催化剂。 也可以使用羧酸的碱金属或季铵或鏻盐来提高银盐催化剂的催化性能。 此外,加入三苯基膦可以在一定程度上加速反应。 银盐催化该方法显着优于先前使用的铜盐。 有利地,该方法使用少量的催化剂,显着缩短反应时间,并且要求较不剧烈的反应条件。 通过该方法生产的环碳酸酯是生产聚合物和其它有用物质如染料和类胡萝卜素的有价值的中间体。