实施例1:
(E)-4-(2-氯苯基)-2-[1-甲基-2-(2-羧基苄叉基)肼基]噻唑1
2-甲基氨基硫脲(1-1)
称取2.5g(17.3mmol)甲基肼硫酸盐于250ml单口瓶中,加入100ml乙醇,搅拌下加入1.6g(20.8mmol)硫氰酸铵,加热至回流,反应72h后,将反应液冷至室温,抽滤,滤液旋干硅胶柱层析(DCM/MeOH=40:1),分第二个副产物,得白色粉末状固体0.63g,产率34.2%。1H NMR(400MHz,DMSO-d6,ppm)δ7.36(s,2H),4.89(s,2H),3.41(s,3H).GC-MS(EI)calcd for C2H7N3S[M]+105.0,found 105.0.
2-甲基-1-(2-羧基苄差基)氨基硫脲(1-2)
称取80mg(0.76mmol)化合物(1)于50ml单口瓶中,加入20ml乙醇,搅拌下加入邻羧基苯甲醛114mg(0.76mmol),加热至回流,TLC监测反应至原料转化完全,将反应液冷至室温,旋干溶剂,硅胶柱层析(DCM/MeOH=120:1),得白色粉末状固体100mg,产率56%。1H NMR(400MHz,DMSO-d6,ppm)δ13.36(br,1H),8.56(s,1H),8.51(s,1H),8.31(d,J=7.8Hz,1H),8.25(s,1H),7.88(d,J=8Hz,1H),7.59(t,J=7.2Hz,1H),7.50(t,J=7.2Hz,1H),3.77(s,3H).LC-MS(ESI)calcd for C10H12N3O2S[M+H]+238.1,found 238.1.
(E)-4-(2-氯苯基)-2-[1-甲基-2-(2-羧基苄叉基)肼基]噻唑1
称取100mg(0.42mmol)化合物(2)于50ml单口瓶中,加入10ml乙醇,搅拌下加入65μL(0.42mmol)2’-氯-2-溴苯乙酮,升温至回流,TLC跟踪反应至原料转化完全,将反应液冷至室温,旋干溶剂,硅胶柱层析(DCM/MeOH=120:1),得黄色粉末状固体106mg,产率67.9%,Mp.210.4-212.0℃。1H NMR(400MHz,DMSO-d6,ppm)δ13.30(s,1H),8.62(s,1H),8.02(d,J=7.6Hz,1H),7.98–7.90(m,2H),7.66(t,J=7.6Hz,1H),7.56–7.49(m,2H),7.47(s,1H),7.43(td,J1=7.4Hz,J2=1.2Hz,1H),7.36(td,J1=7.6Hz,J2=1.6Hz,1H),3.68(s,3H).13C NMR(125MHz,DMSO-d6,ppm)δ168.98,168.57,147.11,136.94,135.17,133.42,132.48,131.51,131.09,130.98,130.75,130.16,129.45,129.19,127.63,126.51,111.41,32.88.HRMS(ESI)calcd for C18H15N3O2SCl[M+H]+372.0574,found 372.0575.
采取类似的方法,本发明人利用相应的起始材料进一步合成了以下化合物:
(E)-4-(2-氯苯基)-2-[1-乙基-2-(2-羧基苄叉基)肼基]噻唑2
Mp.203.3-204.1℃.1H NMR(500MHz,DMSO-d6,ppm)δ13.32(br,1H),8.64(s,1H),7.98–7.91(m,3H),7.66(t,J=7.5Hz,1H),7.56–7.46(m,2H),7.45–7.39(m,2H),7.34(t,J=6.8Hz,1H),4.32(q,J=6.8Hz,2H),1.27(t,J=7.0Hz,3H).13C NMR(125MHz,DMSO-d6,ppm)δ168.56,168.36,147.34,137.00,135.42,133.53,132.50,131.53,131.12,130.92,130.72,130.22,129.42,129.19,127.62,126.62,111.22,40.38,10.33.HRMS(ESI)calcd forC19H17N3O2SCl[M+H]+386.0730,found 386.0728.
(E)-4-(2-氯苯基)-2-[1-丙基-2-(2-羧基苄叉基)肼基]噻唑3
Mp.172.6-173.4℃.1H NMR(400MHz,DMSO-d6,ppm)δ13.35(br,1H),8.65(s,1H),7.98(d,J=8.0Hz,1H),7.95-7.92(m,2H),7.67(t,J=7.2Hz,1H),7.54(d,J=8.0Hz,1H),7.5(t,J=7.6Hz,1H),7.45-7.42(m,2H),7.36(t,J1=7.6Hz,J2=1.6Hz,1H),4.25(t,J=7.2Hz,2H),1.82-1.73(m,2H),0.97(t,J=7.4Hz,1H).13C NMR(100MHz,DMSO-d6,ppm)δ168.54,168.22 146.95,136.63,134.96,133.17,132.11,131.10,130.74,130.55,130.34,129.82,129.04,128.80,127.26,126.09,110.77,46.31,17.98,11.17.HRMS(ESI)calcd forC20H19N3O2SCl[M+H]+400.0887,found 400.0879.
(E)-4-(2-氯苯基)-2-[1-异丙基-2-(2-羧基苄叉基)肼基]噻唑4
Mp.185.4-187.0℃.1H NMR(400MHz,DMSO-d6,ppm)δ13.35(br,1H),8.91(s,1H),7.99(d,J=8.0Hz,1H),7.95-7.92(m,2H),7.67(t,J=7.6Hz,1H),7.54(d,J=8.0Hz,1H),7.52(t,J=7.6Hz,1H),7.46-7.42(m,2H),7.36(td,J1=7.6Hz,J2=1.6Hz,1H),5.22-5.11(m,1H),1.57(d,J=6.8Hz,6H).13C NMR(100MHz,DMSO-d6,ppm)δ168.22,168.21,146.90,137.32,135.23,133.14,132.07,131.06,130.64,130.58,130.39,129.88,128.97,128.78,127.28,125.91,111.12,49.61,18.07,18.07.HRMS(ESI)calcd for C20H19N3O2SCl[M+H]+400.0887,found 400.0885.
(E)-4-(2-氯苯基)-2-[1-(2-丁基)-2-(2-羧基苄叉基)肼基]噻唑5
Mp.170.5-170.6℃.1H NMR(400MHz,DMSO-d6,ppm)δ13.32(br,1H),8.91(s,1H),7.99(d,J=8.0Hz,1H),7.95-7.90(m,2H),7.67(t,J1=7.6Hz,1H),7.55-7.48(m,2H),7.46-7.42(m,2H),7.36(td,J1=7.6Hz,J2=1.6Hz,1H),5.00-4.93(m,1H),2.35-2.24(m,1H),1.92-1.81(m,1H),1.54(d,J=6.8Hz,3H),0.88(t,J=7.2Hz,3H).13C NMR(100MHz,DMSO-d6,ppm)δ168.66,168.19,146.97,137.03,135.24,133.19,132.13,131.04,130.67,130.58,130.39,129.70,128.98,128.77,127.29,125.91,111.04,55.67,25.26,16.33,11.14.HRMS(ESI)calcd for C21H21N3O2SCl[M+H]+414.1043,found 414.1029.
(E)-4-(2-氯苯基)-2-[1-(2-戊基)-2-(2-羧基苄叉基)肼基]噻唑6
Mp.146.7-147.0℃.1H NMR(400MHz,DMSO-d6,ppm)δ13.35(br,1H),8.91(s,1H),7.98(d,J=7.6Hz,1H),7.94(d,J=8.0Hz,1H),7.91(dd,J1=7.6Hz,J2=1.6Hz,1H),7.67(t,J=7.6Hz,1H),7.53(d,J=8.0Hz,1H),7.49(t,J=7.6Hz,1H),7.46-7.42(m,2H),7.36(td,J1=7.6Hz,J2=1.6Hz,1H),5.14-5.06(m,1H),2.34-2.25(m,1H),1.82-1.73(m,1H),1.53(d,J=6.8Hz,3H),1.34-1.24(m,2H),0.89(t,J=7.4Hz,1H).13C NMR(100MHz,DMSO-d6,ppm)δ168.68,168.20,146.98,137.04,135.30,133.20,132.14,131.00,130.68,130.59,130.40,129.68,128.99,127.30,125.90,111.09,53.81,34.20,19.46,16.46,13.60.HRMS(ESI)calcd for C22H23N3O2SCl[M+H]+428.1200,found 428.1193.
(E)-4-(2-氯苯基)-2-[1-羟乙基-2-(2-羧基苄叉基)肼基]噻唑7
Mp.187.9-188.9℃.1H NMR(400MHz,DMSO-d6,ppm)δ13.24(br,1H),8.75(s,1H),7.98-7.01(m,3H),7.66(t,J=7.6Hz,1H),7.54(d,J=8.0Hz,1H),7.49(t,J=7.6Hz,1H),7.45-7.41(m,2H),7.36(td,J1=7.6Hz,J2=1.6Hz,1H),4.35(t,J=6.4Hz,2H),3.76(t,J=6.4Hz,2H).13C NMR(100MHz,DMSO-d6,ppm)δ168.64,168.23,146.87,136.89,134.91,133.15,131.99,131.19,130.71,130.46,130.32,130.16,129.04,128.79,127.22,126.28,110.78,56.24,47.46.HRMS(ESI)calcd for C19H17N3O3SCl[M+H]+402.0679,found 402.0678.
(E)-4-(2-氯苯基)-2-[1-甲基-2-(4-三氟甲基-2-羧基苄叉基)肼基]噻唑8
Mp.209.3-210.7℃.1H NMR(400MHz,DMSO-d6,ppm)δ14.02(br,1H),8.66(s,1H),8.21(d,J=8.0Hz,1H),8.17(s,1H),8.02(d,J=8.0Hz,1H),7.95(d,J=7.6Hz,1H),7.56-7.53(m,2H),7.43(t,J=7.6Hz,1H),7.37(t,J=7.6Hz,1H),3.70(s,3H).13C NMR(100MHz,DMSO-d6,ppm)δ168.33,167.17,146.79,138.38,135.01,132.91,131.12,130.70,130.37,129.14,128.57,128.25,128.20,127.26,127.04,125.10,122.40,111.51,32.68.HRMS(ESI)calcd forC19H14N3O2SClF3[M+H]+440.0447,found 440.0433.
(E)-4-(2-氯苯基)-2-[1-甲基-2-(4-甲基-2-羧基苄叉基)肼基]噻唑9
Mp.231.3-232.5℃.1H NMR(400MHz,DMSO-d6,ppm)δ13.30(br,1H),8.59(s,1H),7.96(d,J=7.6Hz,1H),7.92(d,J=8.0Hz,1H),7.75(s,1H),7.54(d,J=7.6Hz,1H),7.49-7.46(m,2H),7.43(t,J=7.6Hz,1H),7.36(t,J=7.6Hz,1H),3.66(s,3H),2.38(s,3H).13C NMR(100MHz,DMSO-d6,ppm)δ168.60,168.35,146.68,138.54,136.64,133.03,132.70,132.07,131.11,130.86,130.67,130.34,129.83,129.00,127.21,126.04,110.84,32.39,20.69.HRMS(ESI)calcdfor C19H17N3O2SCl[M+H]+386.0730,found 386.0738.
(E)-4-(2-氯苯基)-2-[1-甲基-2-(2-羧基-4-氟苄叉基)肼基]噻唑10
Mp.228.6-229.7℃.1H NMR(400MHz,DMSO-d6,ppm)δ13.28(br,1H),8.14(s,1H),7.93(dd,J1=7.6Hz,J2=1.6Hz,1H),7.61(dd,J1=7.0Hz,J2=1.8Hz,1H),7.55-7.49(m,3H),7.44-7.41(m,1H),7.36(td,J1=7.6Hz,J2=1.6Hz,1H),3.68(s,3H).13C NMR(100MHz,DMSO-d6,ppm)δ168.55,168.01,159.74(d,1J=249Hz),146.67,133.68,133.10,131.50,131.12,130.72,130.32,130.10(d,3J=8.8Hz),129.06,127.23,125.53(d,4J=3.1Hz),121.75(d,2J=11.8Hz),118.76(d,2J=22Hz),111.13,32.28.HRMS(ESI)calcd for C18H14N3O2FSCl[M+H]+390.0479,found 390.0475.
(E)-5-甲基-4-苯基-2-[1-甲基-2-(4-甲基-2-羧基苄叉基)肼基]噻唑11
Mp.243.2-245.2℃.1H NMR(400MHz,DMSO-d6,ppm)δ13.24(br,1H),8.54(s,1H),7.91(d,J=8.0Hz,1H),7.73(s,1H),7.64-7.53(m,2H),7.46-7.42(m,3H),7.33(t,J=7.4Hz,1H),3.60(s,3H),2.44(s,3H),2.38(s,3H).13C NMR(100MHz,DMSO-d6,ppm)δ168.35,165.40,145.43,138.33,135.76,135.16,132.68,132.22,130.86,129.62,128.24,128.24,127.85,127.85,127.06,125.89,119.27,31.85,20.68,12.24.HRMS(ESI)calcd for C20H20N3O2S[M+H]+366.1276,found 366.1273.
(E)-5-甲基-4-苯基-2-[1-甲基-2-(2-羧基苄叉基)肼基]噻唑12
Mp.222.7-224.9℃.1H NMR(400MHz,DMSO-d6,ppm)δ13.32(br,1H),8.58(s,1H),8.01(d,J=8.0Hz,1H),7.92(d,J=7.6Hz,1H),7.68-7.63(m,3H),7.50-7.43(m,3H),7.34(t,J=7.4Hz,1H),3.62(s,3H),2.44(s,3H).13C NMR(100MHz,DMSO-d6,ppm)δ168.24,165.36,145.47,135.66,135.13,134.90,131.98,130.58,129.70,128.59,128.25,128.25,127.86,127.86,127.09,125.94,119.44,31.93,12.24.HRMS(ESI)calcd for C19H16N3O2S[M-H]-350.0963,found350.0951.
(E)-4-(2-氯苯基)-2-[1-甲基-2-(2-羧基苄叉基)肼基]噻唑13
Mp.208.8-209.8℃.1H NMR(400MHz,DMSO-d6,ppm)δ13.46(br,1H),8.60(s,1H),8.01(d,J=8.0Hz,1H),7.92(d,J=8.0Hz,1H),7.64(t,J=7.4Hz,1H),7.56(d,J=7.6Hz,1H),7.49-7.39(m,4H),3.56(s,3H),2.15(s,3H).13CNMR(100MHz,DMSO-d6,ppm)δ168.98,166.46,144.56,136.46,135.29,134.54,133.25,132.50,132.31,131.05,130.72,130.26,130.01,129.09,127.49,126.42,121.85,32.46,12.16.HRMS(ESI)calcd for C19H17N3O2SCl[M+H]+386.0730,found 386.0727.
(E)-5-乙基-4-(2-氯苯基)-2-(2-羧基苄叉肼基)噻唑14
Mp.223.9-223.9℃.1H NMR(500MHz,DMSO-d6,ppm)δ12.57(br,2H),8.79(s,1H),8.01(d,J=8.0Hz,1H),7.88(d,J=8.0Hz,1H),7.62(t,J=7.5Hz,1H),7.56–7.51(m,1H),7.46(t,J=7.5Hz,1H),7.44-7.36(m,3H),2.49(q,J=7.5Hz,1H),1.13(t,J=7.5Hz,3H).13C NMR(125MHz,DMSO-d6,ppm)δ169.28,165.92,144.14,140.84,135.89,135.46,133.99,133.03,133.02,131.46,130.81,130.73,130.60,129.73,128.09,127.73,127.01,20.99,17.25.HRMS(ESI)calcd for C19H17N3O2SCl[M+H]+386.0730,found 386.0729.
(E)-5-甲基-4-(2-氯苯基)-2-(2-羧基苄叉肼基)噻唑15
Mp.217.6-217.8℃.1H NMR(400MHz,DMSO-d6,ppm)δ12.7(br,2H),8.77(s,1H),7.99(d,J=7.6Hz,1H),7.87(d,J=7.2Hz,1H),7.62(t,J=7.4Hz,1H),7.562-7.543(m,1H),7.481-7.397(m,4H),2.14(s,3H).13C NMR(125MHz,DMSO-d6,ppm)δ168.65,165.18,144.49,140.16,135.25,134.56,133.21,132.46,130.83,130.14,130.03,129.11,127.45,126.37,119.49,12.15.HRMS(ESI)calcdfor C18H15N3O2SCl[M+H]+372.0574,found 372.0569.
(E)-5-甲基-4-苯基-2-(2-羧基苄叉肼基)噻唑17
Mp.215.9-216.0℃.1H NMR(400MHz,DMSO-d6,ppm)δ12.7(br,2H),8.77(s,1H),7.99(d,J=7.6Hz,1H),7.87(dd,J1=8.0Hz,J2=1.2Hz,1H),7.63-7.59(m,3H),7.48-7.43(m,3H),7.33(t,J=7.2Hz,1H),2.43(s,3H).13CNMR(125MHz,DMSO-d6,ppm)δ168.66,164.72,146.00,140.05,135.64,135.24,132.36,130.83,130.12,129.08,128.73,128.73,128.35,128.35,127.51,126.33,117.61,12.74.HRMS(ESI)calcd for C18H16N3O2S[M+H]+338.0963,found338.0954.
(E)-4-(2,5-二氯苯基)-2-[1-甲基-2-(2-羧基苄叉基)肼基]噻唑19
Mp.268.4-269.5℃.1H NMR(400MHz,DMSO-d6,ppm)δ13.31(br,1H),8.63(s,1H),8.02-8.00(m,2H),7.93(d,J=7.2Hz,1H),7.67(t,J=7.6Hz,1H),7.63(s,1H),7.58(d,J=7.6Hz,1H),7.50(t,J=7.2Hz,1H),7.43(dd,J1=7.2Hz,J2=2.8Hz,1H),3.68(s,3H).13C NMR(100MHz,DMSO-d6,ppm)δ168.68,168.15,145.13,136.79,134.70,134.21,132.14,132.06,131.85,130.59,130.17,129.76,129.20,128.84,128.58,126.13,112.31,32.49.HRMS(ESI)calcd forC18H14N3O2SCl2[M+H]+406.0184,found 406.0187.
(E)-4-苯基-2-[1-甲基-2-(2-羧基苄叉基)肼基]噻唑20
Mp.205.6-206.8℃.1H NMR(400MHz,DMSO-d6,ppm)δ13.31(br,1H),8.62(s,1H),8.02(d,J=7.6Hz,1H),7.94-7.91(m,3H),7.66(t,J=7.2Hz,1H),7.49(t,J=7.2Hz,1H),7.45-7.40(m,3H),7.31(t,J=7.2Hz,1H),3.71(s,3H).13C NMR(100MHz,DMSO-d6,ppm)δ169.45,168.20,150.18,136.35,134.80,134.49,132.07,130.60,129.71,128.76,128.56,128.56,127.59,126.09,125.54,125.54,105.97,32.51.HRMS(ESI)calcd for C18H16N3O2S[M+H]+338.0963,found 338.0963.
(E)-4-(3-氯苯基)-2-[1-甲基-2-(2-羧基苄叉基)肼基]噻唑21
Mp.244.7-245.4℃.1H NMR(400MHz,DMSO-d6,ppm)δ13.32(br,1H),8.63(s,1H),8.01(d,J=7.6Hz,1H),7.97(s,1H),7.93(d,J=7.6Hz,1H),7.88(d,J=8.0Hz,1H),7.66(t,J=7.6Hz,1H),7.61(s,1H),7.50(t,J=7.6Hz,1H),7.45(t,J=7.6Hz,1H),7.37(d,J=8.0Hz,1H),3.71(s,3H).13C NMR(100MHz,DMSO-d6,ppm)δ169.57,168.18,148.56,136.64,136.50,134.72,133.48,132.06,130.59,130.44,129.76,128.81,127.28,126.12,125.16,124.05,107.56,32.52.HRMS(ESI)calcd for C18H15N3O2SCl[M+H]+372.0574,found 372.0574.
(E)-5-甲基-4-(2-氯苯基)-2-[1-(2-戊基)-2-(2-羧基苄叉基)肼基]噻唑22
Mp.89.9-90.1℃.1H NMR(400MHz,DMSO-d6,ppm)δ13.29(br,1H),8.85(s,1H),7.98(d,J=8.0Hz,1H),7.92(d,J=7.6Hz,1H),7.65(t,J=7.6Hz,1H),7.56-7.54(m,1H),7.51-7.41(m,4H),5.05-4.96(m,1H),2.29-2.22(m,1H),2.16(s,3H),1.75-1.67(m,1H),1.46(d,J=7.2Hz,3H),1.28-1.23(m,2H),0.87(t,J=7.6Hz,3H).13C NMR(100MHz,DMSO-d6,ppm)δ168.23,166.06,144.08,136.14,135.46,134.09,132.79,132.09,131.93,130.58,129.64,129.60,129.48,128.56,126.95,125.73,121.62,53.39,34.01,19.41,16.35,13.58,11.52.HRMS(ESI)calcd for C23H25N3O2SCl[M+H]+442.1356,found 442.1354.
(E)-2-((2-(4-(2-氯苯基)噻唑-2-基)亚肼基)甲基)-6-氟苯甲酸(58)
熔点:211.2-211.7℃.1H NMR(400MHz,DMSO-d6):δ12.40(s,1H),8.18(s,1H),7.86(dd,J1=7.6Hz,J2=1.6Hz,1H),7.69(d,J=8.0Hz,1H),7.55-7.50(m,2H),7.41(t,J=7.6Hz,1H),7.37(s,1H),7.35(t,J=7.6Hz,1H),7.29(t,J=8.8Hz,1H).13C NMR(100MHz,DMSO-d6):167.56,166.14,160.51,158.06,147.64,138.21,138.17,133.94,133.89,133.68,131.54,131.25,130.83,129.53,127.72,122.04,116.51,116.29,109.58.HRMS(ESI)calcd for C17H10N3O2SClF[M-H]-374.0166,found 374.0164.Purity:97.09%(tR 12.05min).