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公开(公告)号:US5294721A
公开(公告)日:1994-03-15
申请号:US934061
申请日:1992-08-21
申请人: Xiu C. Wang , Panos Kalaritis , Michelle L. Chang
发明人: Xiu C. Wang , Panos Kalaritis , Michelle L. Chang
IPC分类号: C07C51/097 , C07C51/377 , C07C63/04 , C07C63/70 , C07C205/58 , C07D213/20 , C07D213/90
CPC分类号: C07D213/20 , C07C201/12 , C07C51/377
摘要: A process for the preparation of halobenzoic acids, comprising the step of reacting a halonitrobenzene with a pyridinium salt to form an intermediate of the formula ##STR1## wherein R is selected from the group consisting of hydrogen, alkyl, aryl, alkenyl, alkynyl, --CN, --COOR' and --COR' where R' is alkyl or aryl; X is chloro or fluoro; Y is hydrogen, chloro or fluoro; and Z is chloro, bromo or iodo.
摘要翻译: 一种制备卤代苯甲酸的方法,包括使卤代硝基苯与吡啶鎓盐反应形成式(*化学结构*)中间体的步骤,其中R选自氢,烷基,芳基,烯基, 炔基,-CN,-COOR'和-COR',其中R'是烷基或芳基; X是氯或氟; Y是氢,氯或氟; Z是氯,溴或碘。
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公开(公告)号:US5637765A
公开(公告)日:1997-06-10
申请号:US462235
申请日:1995-06-05
申请人: Xiu C. Wang , Panos Kalaritis , Michelle L. Chang
发明人: Xiu C. Wang , Panos Kalaritis , Michelle L. Chang
IPC分类号: C07C51/363 , C07C205/12 , C07C205/45 , C07C205/56 , C07C205/58 , C07C255/35 , C07C205/00
CPC分类号: C07C255/35 , C07C205/12 , C07C205/45 , C07C205/56 , C07C205/58 , C07C51/363
摘要: A process for the preparation of 2-chloro-4,5-difluorobenzoic acid and 2,4,5-trifluorobenzoic acid as well as synthetic intermediates useful in and prepared according thereto, comprising reacting a nitrobenzene having the formula ##STR1## wherein X is chloro or fluoro, with an appropriate carbanion to form a compound having the formula ##STR2## wherein one of Y and Z is chloro and the other is nitro, and R is a radical selected from the group consisting of --CCl.sub.3, --CH.sub.2 NO.sub.2, --CH(NO.sub.2)R.sup.1, --CH(CO.sub.2 R.sup.1).sub.2, --CH(C(O)R.sup.2).sub.2, --CH(CN)CO.sub.2 R.sup.1, --CH(CO.sub.2 R.sup.1)COR.sup.2 and --COR.sup.2 where R.sup.1 is alkyl or arylalkyl and R.sup.2 is alkyl, aryl or arylalkyl and, where appearing more than once in such a radical, R.sup.1 and R.sup.2 may be the same or different at each occurrence.
摘要翻译: 一种制备2-氯-4,5-二氟苯甲酸和2,4,5-三氟苯甲酸的方法,以及可用于和制备的合成中间体,包括使具有下式的硝基苯:其中X为 氯或氟,与适当的碳负离子形成具有下式的化合物:硝基,R是选自-CCl 3,-CH 2 NO 2,-CH(NO 2)R 1,-CH(CO 2 R 1) 2,-CH(C(O)R 2)2,-CH(CN)CO 2 R 1,-CH(CO 2 R 1)COR 2和-COR 2,其中R 1是烷基或芳基烷基,R 2是烷基,芳基或芳烷基,并且其中出现多于一次 在这样的基团中,R 1和R 2可以在每次出现时相同或不同。
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公开(公告)号:US5633399A
公开(公告)日:1997-05-27
申请号:US463410
申请日:1995-06-05
申请人: Xiu C. Wang , Panos Kalaritis , Michelle L. Chang
发明人: Xiu C. Wang , Panos Kalaritis , Michelle L. Chang
IPC分类号: C07C51/363 , C07C205/12 , C07C205/45 , C07C205/56 , C07C205/58 , C07C255/35 , C07C51/27 , C07C51/305
CPC分类号: C07C255/35 , C07C205/12 , C07C205/45 , C07C205/56 , C07C205/58 , C07C51/363
摘要: A process for the preparation of 2-chloro-4,5-difluorobenzoic acid and 2,4,5-trifluorobenzoic acid as well as synthetic intermediates useful in and prepared according thereto, comprising reacting a nitrobenzene having the formula ##STR1## wherein X is chloro or fluoro, with an appropriate carbanion to form a compound having the formula ##STR2## wherein one of Y and Z is chloro and the other is nitro, and R is a radical selected from the group consisting of --CCl.sub.3, --CH.sub.2 NO.sub.2, --CH(NO.sub.2)R.sup.1, --CH(CO.sub.2 R.sup.1).sub.2, --CH(C(O)R.sup.2).sub.2, --CH(CN)CO.sub.2 R.sup.1, --CH(CO.sub.2 R.sup.1)COR.sup.2 and --COR.sup.2 where R.sup.1 is alkyl or arylalkyl and R.sup.2 is alkyl, aryl or arylalkyl and, where appearing more than once in such a radical, R.sup.1 and R.sup.2 may be the same or different at each occurrence.
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公开(公告)号:US5576455A
公开(公告)日:1996-11-19
申请号:US461782
申请日:1995-06-05
申请人: Xiu C. Wang , Panos Kalaritis , Michelle L. Chang
发明人: Xiu C. Wang , Panos Kalaritis , Michelle L. Chang
IPC分类号: C07C51/363 , C07C205/12 , C07C205/45 , C07C205/56 , C07C205/58 , C07C255/35 , C07C255/03 , C07C205/06
CPC分类号: C07C255/35 , C07C205/12 , C07C205/45 , C07C205/56 , C07C205/58 , C07C51/363
摘要: A process for the preparation of 2-chloro-4,5-difluorobenzoic acid and 2,4,5-trifluorobenzoic acid as well as synthetic intermediates useful in and prepared according thereto, comprising reacting a nitrobenzene having the formula ##STR1## wherein X is chloro or fluoro, with an appropriate carbanion to form a compound having the formula ##STR2## wherein one of Y and Z is chloro and the other is nitro, and R is a radical selected from the group consisting of --CCl.sub.3, --CH.sub.2 NO.sub.2, --CH(NO.sub.2)R.sup.1, --CH(CO.sub.2 R.sup.1).sub.2, --CH(C(O)R.sup.2).sub.2, --CH(CN)CO.sub.2 R.sup.1, --CH(CO.sub.2 R.sup.1)COR.sup.2 and --COR.sup.2 where R.sup.1 is alkyl or arylalkyl and R.sup.2 is alkyl, aryl or arylalkyl and, where appearing more than once in such a radical, R.sup.1 and R.sup.2 may be the same or different at each occurrence.
摘要翻译: 一种制备2-氯-4,5-二氟苯甲酸和2,4,5-三氟苯甲酸的方法,以及可用于和制备的合成中间体,包括使具有下式的硝基苯:其中X为 氯或氟,与适当的碳负离子形成具有下式的化合物:硝基,R是选自-CCl 3,-CH 2 NO 2,-CH(NO 2)R 1,-CH(CO 2 R 1) 2,-CH(C(O)R 2)2,-CH(CN)CO 2 R 1,-CH(CO 2 R 1)COR 2和-COR 2,其中R 1是烷基或芳基烷基,R 2是烷基,芳基或芳烷基,并且其中出现多于一次 在这样的基团中,R 1和R 2可以在每次出现时相同或不同。
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