CN1934089A - 1,5-二苯基吡唑甲酸衍生物的制备方法 - Google Patents

1,5-二苯基吡唑甲酸衍生物的制备方法 Download PDF

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CN1934089A
CN1934089A CNA2005800076423A CN200580007642A CN1934089A CN 1934089 A CN1934089 A CN 1934089A CN A2005800076423 A CNA2005800076423 A CN A2005800076423A CN 200580007642 A CN200580007642 A CN 200580007642A CN 1934089 A CN1934089 A CN 1934089A
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M·多马斯
P·韦龙
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Sanofi Aventis France
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    • CCHEMISTRY; METALLURGY
    • C07ORGANIC CHEMISTRY
    • C07DHETEROCYCLIC COMPOUNDS
    • C07D231/00Heterocyclic compounds containing 1,2-diazole or hydrogenated 1,2-diazole rings
    • C07D231/02Heterocyclic compounds containing 1,2-diazole or hydrogenated 1,2-diazole rings not condensed with other rings
    • C07D231/10Heterocyclic compounds containing 1,2-diazole or hydrogenated 1,2-diazole rings not condensed with other rings having two or three double bonds between ring members or between ring members and non-ring members
    • C07D231/14Heterocyclic compounds containing 1,2-diazole or hydrogenated 1,2-diazole rings not condensed with other rings having two or three double bonds between ring members or between ring members and non-ring members with hetero atoms or with carbon atoms having three bonds to hetero atoms with at the most one bond to halogen, e.g. ester or nitrile radicals, directly attached to ring carbon atoms
    • C07D231/18One oxygen or sulfur atom
    • C07D231/20One oxygen atom attached in position 3 or 5
    • C07D231/22One oxygen atom attached in position 3 or 5 with aryl radicals attached to ring nitrogen atoms
    • C07D231/24One oxygen atom attached in position 3 or 5 with aryl radicals attached to ring nitrogen atoms having sulfone or sulfonic acid radicals in the molecule
    • CCHEMISTRY; METALLURGY
    • C07ORGANIC CHEMISTRY
    • C07DHETEROCYCLIC COMPOUNDS
    • C07D231/00Heterocyclic compounds containing 1,2-diazole or hydrogenated 1,2-diazole rings
    • C07D231/02Heterocyclic compounds containing 1,2-diazole or hydrogenated 1,2-diazole rings not condensed with other rings
    • C07D231/10Heterocyclic compounds containing 1,2-diazole or hydrogenated 1,2-diazole rings not condensed with other rings having two or three double bonds between ring members or between ring members and non-ring members
    • C07D231/14Heterocyclic compounds containing 1,2-diazole or hydrogenated 1,2-diazole rings not condensed with other rings having two or three double bonds between ring members or between ring members and non-ring members with hetero atoms or with carbon atoms having three bonds to hetero atoms with at the most one bond to halogen, e.g. ester or nitrile radicals, directly attached to ring carbon atoms
    • C07D231/16Halogen atoms or nitro radicals
    • CCHEMISTRY; METALLURGY
    • C07ORGANIC CHEMISTRY
    • C07DHETEROCYCLIC COMPOUNDS
    • C07D231/00Heterocyclic compounds containing 1,2-diazole or hydrogenated 1,2-diazole rings
    • C07D231/02Heterocyclic compounds containing 1,2-diazole or hydrogenated 1,2-diazole rings not condensed with other rings
    • C07D231/10Heterocyclic compounds containing 1,2-diazole or hydrogenated 1,2-diazole rings not condensed with other rings having two or three double bonds between ring members or between ring members and non-ring members
    • C07D231/14Heterocyclic compounds containing 1,2-diazole or hydrogenated 1,2-diazole rings not condensed with other rings having two or three double bonds between ring members or between ring members and non-ring members with hetero atoms or with carbon atoms having three bonds to hetero atoms with at the most one bond to halogen, e.g. ester or nitrile radicals, directly attached to ring carbon atoms
    • CCHEMISTRY; METALLURGY
    • C07ORGANIC CHEMISTRY
    • C07DHETEROCYCLIC COMPOUNDS
    • C07D231/00Heterocyclic compounds containing 1,2-diazole or hydrogenated 1,2-diazole rings
    • C07D231/02Heterocyclic compounds containing 1,2-diazole or hydrogenated 1,2-diazole rings not condensed with other rings
    • C07D231/10Heterocyclic compounds containing 1,2-diazole or hydrogenated 1,2-diazole rings not condensed with other rings having two or three double bonds between ring members or between ring members and non-ring members
    • C07D231/14Heterocyclic compounds containing 1,2-diazole or hydrogenated 1,2-diazole rings not condensed with other rings having two or three double bonds between ring members or between ring members and non-ring members with hetero atoms or with carbon atoms having three bonds to hetero atoms with at the most one bond to halogen, e.g. ester or nitrile radicals, directly attached to ring carbon atoms
    • C07D231/18One oxygen or sulfur atom
    • C07D231/20One oxygen atom attached in position 3 or 5
    • C07D231/22One oxygen atom attached in position 3 or 5 with aryl radicals attached to ring nitrogen atoms

Abstract

本发明涉及式(I)化合物的制备方法:式中:W代表-COOR基团或-CN基;R1代表氢或卤素原子或(C1-C4)烷基;R2、R3、R4、R5、R6、R7每个彼此独自地代表氢或卤素原子或(C1-C4)烷基、(C1-C4)烷氧基或三氟甲基;R代表(C1-C4)烷基或苄基。

Description

1,5-二苯基吡唑甲酸衍生物的制备方法
本发明的目的是1,5-二苯基吡唑-3-甲酸衍生物的新制备方法。
人们已描述过1,5-二苯基-4-甲基吡唑-3-甲酸酯,具体地在欧洲专利EP 576 357和US 5 624 941中描述过这些酯。这些酯是制备1,5-二苯基-4-甲基吡唑-3-甲酸衍生物的有用中间体,它们是大麻素CB1受体的拮抗剂。
更特别地,在欧洲专利EP 656 354中描述的5-(4-氯苯基)-1-(2,4-二氯苯基)-4-甲基吡唑-3-甲酸乙酯,是制备N-哌啶子基-5-(4-氯苯基)-1-(2,4二氯苯基)-4-甲基吡唑-3-甲酰胺的有用中间体,其国际通用名称是rimonabant。
本发明的目的是下式化合物的制备方法:
Figure A20058000764200101
式中:
-W代表-COOR基团或-CN基;
-R1代表氢或卤素原子或(C1-C4)烷基;
-R2、R3、R4、R5、R6、R7每个彼此独自地代表氢或卤素原子或(C1-C4)烷基、(C1-C4)烷氧基或三氟甲基;
-R代表(C1-C4)烷基或苄基;
其特征在于在溶剂中,在碱性介质中的催化剂存在下,让下式苯基硼酸衍生物:
式中R5、R6和R7如式(I)中所定义,与下式化合物进行反应:
式中:
-W、R1、R2、R3、R4如式(I)中所定义;
-Y代表(C1-C4)烷基、(C1-C4)全氟烷基、未被取代或被甲基、氯或硝基取代的苯基。
特别地,本发明的目的是下式化合物的制备方法:
Figure A20058000764200113
式中:
-R1、R2、R3、R4、R5、R6、R7和R如式(I)化合物所定义;
其特征在于在溶剂中,在碱性介质中的催化剂存在下,让如前面定义的式(II)苯基硼酸衍生物与下式化合物进行反应:
Figure A20058000764200121
式中:
-Y、R、R1、R2、R3和R4如前面所定义。
还特别地,本发明的目的是下式化合物的制备方法:
Figure A20058000764200122
式中:
-R1、R2、R3、R4、R5、R6和R7如式(I)化合物所定义;
其特征在于在溶剂中,在碱性介质中的催化剂存在下,让如前面定义的式(II)苯基硼酸衍生物与下式化合物进行反应:
Figure A20058000764200123
式中:
-Y、R1、R2、R3和R4如前面所定义。
优选地,在例如甲苯的芳族溶剂中、或在例如四氢呋喃或二甲氧基乙烷的含醚溶剂中或在二氧杂环己烷中,在钯配合物,例如四(三苯基膦)钯的存在下和在碱性介质中,例如在碱金属碳酸盐存在下,例如在碳酸钠或碳酸钾存在下,进行式(II)化合物与式(III)、(IIIA)或(IIIB)化合物的反应。
根据一个优选实施方式,在双相介质中,在四(三苯基膦)钯的存在下进行该反应,碱性介质是由碳酸钠水溶液组成的。
根据制备式(I)化合物的优选方法,让式(II)苯基硼酸衍生物与式(III)化合物进行反应,式中Y代表CF3基团,即下式化合物:
还根据制备式(IA)化合物的优选方法,让式(II)苯基硼酸衍生物与式(IIIA)化合物进行反应,其中Y代表CF3,即下式化合物:
Figure A20058000764200132
还根据制备式(IB)化合物的优选方法,让式(II)苯基硼酸衍生物与式(IIIB)化合物进行反应,其中Y代表CF3,即下式化合物:
Figure A20058000764200141
更优选地,让4-氯苯基硼酸与下式化合物进行反应:
Figure A20058000764200142
更优选地,让4-氯苯基硼酸与下式化合物进行反应:
Figure A20058000764200143
还优选地,让4-氯苯基硼酸与下式化合物进行反应:
最后,更优选地,让4-溴苯基硼酸与下式化合物进行反应:
由下式吡唑酮衍生物得到式(III)化合物:
特别地,由下式吡唑酮衍生物得到式(IIIA)化合物:
特别地,由下式吡唑酮衍生物也得到式(IIIB)化合物:
Figure A20058000764200162
为了制备式(III)、(IIIA)或(IIIB)化合物,让式(YSO2)2O酸酐或式YSO2Cl氯化物与式(IV)、(IVA)或(IVB)化合物进行反应;在碱,优选地叔胺存在下进行这个反应。
特别地,下式化合物:
Figure A20058000764200163
是在例如叔胺的碱存在下,在例如二氯甲烷的溶剂中,由三氟甲基磺酸酐与下式吡唑酮衍生物反应得到的:
还特别地,下式化合物:
是在例如叔胺的碱存在下,在例如二氯甲烷的溶剂中,由三氟甲基磺酸酐与下式吡唑酮衍生物反应得到的:
最后,特别地,下式化合物:
Figure A20058000764200181
是在例如叔胺的碱存在下,在例如二氯甲烷的溶剂中,由三氟甲基磺酸酐与下式吡唑酮衍生物反应得到的:
Figure A20058000764200182
优选地,在二氯甲烷中,在温度-5℃至+5℃下,通过等摩尔的三氟甲基磺酸酐和三乙胺化合物的作用,得到式(III)、(IIIA)或(IIIB)化合物,其中Y代表CF3
下式化合物:
是通过下式肼衍生物:
其中R2、R3、R4如式(I)所定义,与下式衍生物的反应得到的:
Figure A20058000764200192
其中R、R1和W如上述式(I)所定义。
特别地,下式化合物:
Figure A20058000764200193
是通过式(V)肼衍生物与下式衍生物的反应得到的:
还特别地,下式化合物:
Figure A20058000764200201
是通过式(V)肼衍生物与下式衍生物的反应得到的:
Figure A20058000764200202
优选地,在溶剂中,在酸性介质中,例如在乙酸中;或在有盐酸、乙酸或三氟乙酸的甲苯中,使用式(V)肼盐酸盐。
式(VI)、(VIA)或(VIB)3-氧代琥珀酸酯衍生物是已知的,或可采用已知的方法制备得到,例如烯醇酯与草酸酯的Claisen缩合反应。
式(IV)化合物能以两种互变异构体形态存在:
Figure A20058000764200203
根据另一方面,本发明的目的是下式化合物:
Figure A20058000764200211
式中:
-W代表-COOR基团或CN基;
-Y代表(C1-C4)烷基、(C1-C4)全氟烷基、未被取代或被甲基、氯或硝基取代的苯基;
-R1代表氢或卤素原子或(C1-C4)烷基;
-R2、R3、R4每个彼此独自地代表氢或卤素原子或(C1-C4)烷基、(C1-C4)烷氧基、三氟甲基;
-R代表(C1-C4)烷基或苄基。
优选地,本发明的目的是下式化合物:
Figure A20058000764200212
式中:
-Y、R、R1、R2、R3和R4如前面所定义。
优选地,本发明的目的是下式化合物:
式中:
-Y、R1、R2、R3和R4如前面所定义。
更优选地,本发明的目的是下式化合物:
Figure A20058000764200222
还优选地,本发明的目的是下式化合物:
Figure A20058000764200223
还优选地,本发明的目的是下式化合物:
还优选地,本发明的目的是下式化合物:
Figure A20058000764200232
下述实施例是非限制性的,它说明本发明的实施方式。
以所谓的电喷雾(ES)电离方式测量质谱。
NMR观察信号表示如下:s:单峰;se:展宽单峰;d:双峰;d.d:分裂双峰;t:三重峰;td:分裂三重峰;q:四重峰;m:未分辨峰;mt:多重峰。
实施例1
制备5-(4-氯苯基)-1-(2,4-二氯苯基)-4-甲基-1H-吡唑-3-甲酸乙酯。
A)1-(2,4-二氯苯基)-4-甲基-5-氧代-4,5-二氢-1H-吡唑-3-甲酸乙酯。
在氮气下,把12.6g 2,4-二氯苯基肼盐酸盐加到100ml甲苯中;搅拌后,添加10g 2-甲基-3-氧代琥珀酸二乙酯,然后加热与在55℃添加5ml TFA。在搅拌下让其溶剂回流4.5小时。再返回到TA,再加热到75℃,用30ml水使该反应介质水解。倾析,分离含水相,然后蒸发有机相除去残留的TFA。该有机相用10ml甲苯回收,期望产物进行结晶,m=10.2g。
ES-:[M-H]-=313.0
NMR(DMSO-d6 1H,在300MHz):1.26ppm:t:3H;2.11ppm:s:3H;4.23ppm:q:2H;7.57ppm:m:2H;7.87ppm:se:1H;11.04ppm:se:1H.
B)1-(2,4-二氯苯基)-4-甲基-5-(((三氟甲基)磺酰基)氧基)-1H-吡唑-3-甲酸乙酯。
在氮气下,将5g在前面步骤得到的吡唑酮悬浮于25ml DCM中,并在搅拌下冷却到0℃。添加2.4ml TEA,再添加3ml三氟甲基磺酸酐,在0℃下保持搅拌15分钟。该反应介质用20ml DCM进行水解。倾析该反应介质,然后有机相用20ml水洗涤。分离含水相。蒸发有机相,得到的油进行硅胶柱色谱纯化,用戊烷/AcOEt混合物(90/10;v/v)洗脱。含有期望化合物的这些馏分合并并蒸发至干。得到6.77g期望化合物。
ES+:[M+Na]+=468.8
NMR(DMSO-d61H,在300MHz):1.31ppm:t:3H;2.27ppm:s:3H;4.34ppm:q:2H;7.72ppm:dd:1H;7.79ppm:d:1H;8.04ppm:d:1H.
C)5-(4-氯苯基)-1-(2,4-二氯苯基)-4-甲基-1H-吡唑-3-甲酸乙酯。
在氮气下,让2.55g在前面步骤得到的三氟甲基磺酸吡唑、1.08g 4-氯苯基硼酸和67mg四(三苯基膦)钯混合在一起;添加25ml甲苯和7.1ml 2M碳酸钠水溶液。该反应介质在65℃搅拌6小时。倾析反应介质,分离含水相,然后用10ml水洗涤有机相。倾析后,蒸发有机相。得到的产物进行硅胶柱色谱纯化,用环己烷/AcOEt混合物(85/15;v/v)洗脱。得到1.890g期望化合物。
NMR(DMSO-d61H,在300MHz):1.31ppm:t:3H;2.23ppm:s:3H;4.32ppm:q:2H;7.24ppm:d:2H;7.46ppm:d:2H;7.57ppm:dd:1H;7.73ppm:d:1H;7.77:d:1H.

Claims (17)

1.下式化合物的制备方法:
Figure A2005800076420002C1
式中:
-W代表-COOR基团或-CN基;
-R1代表氢或卤素原子或(C1-C4)烷基;
-R2、R3、R4、R5、R6、R7每个彼此独自地代表氢或卤素原子或(C1-C4)烷基、(C1-C4)烷氧基或三氟甲基;
-R代表(C1-C4)烷基或苄基;
其特征在于让下式苯基硼酸衍生物:
Figure A2005800076420002C2
式中R5、R6、R7如前面式(I)中所定义,与下式化合物进行反应:
Figure A2005800076420002C3
式中:
-W、R1、R2、R3、R4如式(I)中所定义;
-Y代表(C1-C4)烷基、(C1-C4)全氟烷基、未被取代或被甲基、氯或硝基取代的苯基。
2.根据权利要求1所述的下式化合物制备方法:
式中:
-R1、R2、R3、R4、R5、R6、R7和R如权利要求1式(I)化合物所定义;
其特征在于让如权利要求1定义的式(II)苯基硼酸衍生物与下式化合物进行反应:
式中:
-Y、R1、R2、R3和R4如权利要求1所定义。
3.根据权利要求1所述的下式化合物制备方法:
Figure A2005800076420004C1
式中:
-R1、R2、R3、R4、R5、R6和R7如权利要求1式(I)化合物所定义;
其特征在于让如权利要求1定义的式(II)苯基硼酸衍生物与下式化合物进行反应:
Figure A2005800076420004C2
式中:
-Y、R、R1、R2、R3和R4如权利要求1所定义。
4.根据权利要求1所述的方法,其特征在于让如权利要求1所限定的式(II)苯基硼酸衍生物与下式化合物进行反应:
式中:
-W、R1、R2、R3、R4如权利要求1所定义。
5.根据权利要求2所述的方法,其特征在于让如权利要求1所限定的式(II)苯基硼酸衍生物与下式化合物进行反应:
Figure A2005800076420005C1
式中:
-R、R1、R2、R3、R4如权利要求1所定义。
6.根据权利要求3所述的方法,其特征在于让如权利要求1所限定的式(II)苯基硼酸衍生物与下式化合物进行反应:
Figure A2005800076420005C2
式中:
-R1、R2、R3和R4如权利要求1所定义。
7.根据权利要求5所述的方法,其特征在于让4-氯苯基硼酸与下式化合物进行反应:
Figure A2005800076420006C1
8.根据权利要求5所述的方法,其特征在于让4-溴苯基硼酸与下式化合物进行反应:
Figure A2005800076420006C2
9.根据权利要求6所述的方法,其特征在于让4-氯苯基硼酸与下式化合物进行反应:
Figure A2005800076420006C3
10.根据权利要求6所述的方法,其特征在于4-溴苯基硼酸与下式化合物进行反应:
Figure A2005800076420007C1
11.下式化合物:
Figure A2005800076420007C2
式中:
-W代表-COOR基团或CN基;
-Y代表(C1-C4)烷基、(C1-C4)全氟烷基、未被取代或被甲基、氯或硝基取代的苯基;
-R1代表氢或卤素原子或(C1-C4)烷基;
-R2、R3、R4每个彼此独自地代表氢或卤素原子或(C1-C4)烷基、(C1-C4)烷氧基、三氟甲基;
-R代表(C1-C4)烷基或苄基。
12.根据权利要求11所述的下式化合物:
Figure A2005800076420008C1
式中:
-Y、R、R1、R2、R3和R4如权利要求11中所定义。
13.根据权利要求11所述的下式化合物:
式中:
-Y、R1、R2、R3和R4如权利要求11中所定义。
14.根据权利要求12所述的下式化合物:
Figure A2005800076420008C3
15.根据权利要求12所述的下式化合物:
Figure A2005800076420009C1
16.根据权利要求13所述的下式化合物:
Figure A2005800076420009C2
17.根据权利要求13所述的下式化合物:
CNA2005800076423A 2004-05-10 2005-05-10 1,5-二苯基吡唑甲酸衍生物的制备方法 Pending CN1934089A (zh)

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