CN101486710B - 一种合成3-卤代中氮茚类化合物的方法 - Google Patents
一种合成3-卤代中氮茚类化合物的方法 Download PDFInfo
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Abstract
本发明提供了一种合成3-卤代中氮茚类化合物的方法,是一种有效的以中氮茚类化合物为底物,在卤化铜的作用下合成3-卤代中氮茚类化合物的方法。与文献方法相比,该方法可适底物范围广,试剂价廉易得,反应条件温和,操作简便,而且反应效率高,选择性高。
Description
技术领域
本发明涉及一种合成3-卤代中氮茚类化合物的方法,该方法是以中氮茚类化合物为原料,在卤化铜的作用下进行。该反应可以高效、高选择性地合成3-卤代中氮茚类化合物。
背景技术
中氮茚类化合物是一类重要的杂环化合物,是广泛存在于具有生物活性的天然产物以及合成药物中的结构单元。上个世纪五十年代以来,关于中氮茚化合物的合成与研究获得了化学界的广泛关注。3-卤代中氮茚类化合物本身具有重要的生理活性,同时它又可以作为有机合成中的中间体,在合成中具有潜在的应用价值。a)Michael,J.P.Alkaloids 2001,55,91;b)Michael,J.P.Nat.Prod.Rep.2007,24,191.;c)Michael,J.P.Nat.Prod.Rep.2008,25,139;d)Molyneux,R.J.;James,L.F. Science 1982,216,190;e)Hagishita,S.;Yamada,M.;Shirahase,K.;Okada,T.;Murakami,Y.;Ito,Y.;Matsuura,T.;Wada,M.;Kato,T.;Ueno,M.;Chikazawa,Y.;Yamada,K.;Ono,T.;Teshirogi,I.;Ohtani,M.J.Med.Chem.1996,39,3636;f)Millet,R.;Domarkas,J.;Rigo,B.;Goossens,L.;Goossens,J.-F.;Houssin,R.;Hénichart,J.-P.Bioorg.Med.Chem.2002,10,2905;g)Oslund,R.C.;Cermark,N.;Gelb,M.H.J.Med.Chem.2008,51,4708;h)Rogers,B.N.;Piotrowski,D.W.;Walker,D.P.;Jacobsen,E.J.;Acker,B.A.;Wishka,D.G.;Groppi,V.E.PCT Int.Appl.WO 2003070732,2003.目前文献中对3-卤代中氮茚类化合物的合成报道寥寥可数,一类是吡啶与二氯卡宾进行反应,另一类是使用卤化试剂(溴/乙酸,N-溴代丁二酰亚胺/乙酸,N-氯代丁二酰亚胺/乙酸),这两类方法的缺点都是反应产率低,副产物多。i)Smith,K.A.;Streitwieser,A.,Jr.J.Org.Chem.1983,48,2629;j)Smith,K.A.;Waterman,K.C.;Streitwieser,A.,Jr.J.Org.Chem.1985,50,3360;k)Nielsen,K.B.Acta.Chem.Scand.1977,B31,224;l)Khlebnikov,A.F.;Kostikov,R.R.Chem.Heterocycl.Compd.1987,23,708;m)Blache,Y.;Gueiffier,A.;Chavignon,O.;Teulade,J.C.;Milhavet,J.C.;Viols,H.;Chapat,J.P.;Dauphin,G.J.Heterocycl.Chem.1994,31,161.因而发展一种操作方便,条件温和,底物适用范围广而且效率高的合成3-卤代中氮茚类化合物的方法是重点和难点。本发明人发展的以中氮茚类化合物为原料,在卤化铜的作用下合成3-卤代中氮茚类化合物的方法弥补了文献报道的不足,为一种简便实用的合成方法。
发明内容
本发明的目的是要提供一种高效的合成3-卤代中氮茚类化合物的方法。
本发明的方法是一种高效的合成3-卤代中氮茚类化合物的方法。该方法是以中氮茚类化合物为原料,在卤化铜的作用下进行的,在有机溶剂的存在下和0℃~100℃下,以中氮茚合类化物为原料,在卤化铜的存在下,反应1-96小时制得3-卤代中氮茚类化合物;所述的中氮茚合物类化合物、卤化铜的摩尔比为1∶1~5;推荐的摩尔比为1∶1.5。
所述的中氮茚合物类化合物结构式为其中R1,或R2任意选自H,C1-C16的烷基、C3-C16的环烷基、氨基或取代的胺基、C1-C16的烷氧基或者卤素原子、C1-C16的酰基、C5~C10的含N、O或S的杂环基或者杂芳基、取代的芳基,其中R3、R4、R5、R6或R7任意选自H、F、Cl、Br、I、C1_C16的烃氧基、C1_C16的烷基、C2_C16烯基、C2_C16炔基、C3_C16环烷基、苄基、氨基或共轭芳基;其中;所述的共轭芳基为萘基、蒽基或菲基;所述的芳基为苯基或萘基;R1和R2可以单独成键或者相互成键;
所述取代的芳基上的取代基为碳数为1~18烷基或碳数为1~18烷氧基;取代的胺基上的取代基为C1-C16的烷基、或者C5~C10的含N、O或S的杂环芳基或者杂环烷基;或取代的芳基,其中R3、R4、R5、R6或R7任意选自H、F、Cl、Br、I、C1_C16的烃氧基、C1_C16的烷基、C2_C16烯基、C2_C16炔基、C3_C16环烷基、苄基、氨基或共轭芳基;其中;所述的共轭芳基为萘基、蒽基或菲基;所述的芳基为苯基或萘基;
所述的卤化铜为氯化铜、溴化铜等;
本发明方法中,所述有机溶剂可以是极性或非极性溶剂。如苯、四氯化碳、石油醚、四氢呋喃、二甲基甲酰胺、二甲基乙酰胺、乙醚、二氯甲烷、三氯甲烷、甲苯、二甲苯、环己烷、正己烷、正庚烷或乙腈等。
采用本发明方法所得产物可以经过重结晶,薄层层析,柱层析减压蒸馏等方法加以分离。如用重结晶的方法,推荐溶剂为极性溶剂与非极性溶剂的混合溶剂。推荐溶剂可为二氯甲烷-正己烷、异丙醇-石油醚、乙酸乙酯-石油醚、乙酸乙酯-正己烷或异丙醇-乙酸乙酯-石油醚等混合溶剂。用薄层层析和柱层析方法,所用的展开剂为极性溶剂与非极性溶剂的混合溶剂。推荐溶剂可为异丙醇-石油醚、乙酸乙酯-石油醚、乙酸乙酯-正己烷或异丙醇-乙酸乙酯-石油醚等混合溶剂,其体积比可以分别是:极性溶剂∶非极性溶剂=1∶0.1-500。例如:乙酸乙酯∶石油醚=1∶0.1-50,异丙醇∶石油醚=1∶0.1-500。
本发明方法的产物结构为R1,R2任意选自H,C1-C16的烷基、C3-C16的环烷基、氨基或取代的胺基、烷氧基或者卤素原子、酰基、C5~C10的含N、O或S的杂环基或者杂芳基、取代的芳基;X=Cl或Br;R1和R2可以单独成键或者相互成键;
所述取代的芳基上的取代基为烷基、烷氧基碳数为1~18;取代的胺基上的取代基为C1-C16的烷基、芳基、取代芳基或者C5~C10的含N、O或S的杂环芳基或者杂环烷基;
本发明提供了一种有效的以中氮茚类化合物为原料,在卤化铜的作用下合成3-卤代中氮茚类化合物的方法。与文献方法相比,该方法可适底物范围广,试剂价格低廉,方便易得,反应条件温和,操作简便,而且反应效率高,选择性高。
具体实施方式
通过下述实施例将有助于理解本发明,但并不限制本发明的内容。
实施例1:中氮茚类化合物在氯化铜的作用下的氯化反应
在一干燥的反应管中加入中氮茚(0.2mmol)、氯化铜(0.3mmol)和CH3CN(1mL),40℃下反应20小时,反应结束后自然冷至室温。加入饱和氯化铵溶液(15mL),EtOAc萃取两次(2×30mL)。有机相合并,依次水洗(15mL),饱和食盐水洗(15mL),无水硫酸钠干燥。减压除去溶剂后残留物柱层析分离得产物;
P1:methyl 3-chloropyrrolo[2,1-a]isoquinoline-1-carboxylate
7,8-苯并-3-氯中氮茚-1-甲酸甲酯
(乙酸乙酯/石油醚=1/40,v/v);白色固体,93%产率。IR(film)1720,1328,1200,1069,784,755cm-1;1H NMR(300MHz,CDCl3)δ3.92(s,3H),7.03(d,J=7.5Hz,1H),7.17(s,1H),7.49-7.54(m,1H),7.58-7.63(m,2H),7.89(d,J=7.2Hz,1H),9.79(d,J=8.7Hz,1H);13C NMR(75MHz,CDCl3)δ51.5,107.8,110.6,114.1,114.1,120.1,125.2,126.8,126.9,127.8,127.8,128.3,131.8,164.9;MS(EI)m/z 259(89.07)[M]+,228(100);HRMS(EI)计算值(calcd for)C14H10NO2Cl 259.0400,实测值(Found)259.0402;mp:96-98℃.
P2:methyl 3-chloroindolizine-1-carboxylate
3-氯中氮茚-1-甲酸甲酯
乙酸乙酯/石油醚=1/10,v/v;白色固体,58%产率。IR(film)1706,1510,1300,1228,1055,771,736cm-1;1H NMR(300MHz,CDCl3)δ3.89(s,3H),6.85(dd,J=6.9,6.9Hz,1H),7.10(dd,J=8.4,7.2Hz,1H),7.18(s,1H),8.06(d,J=6.6Hz,1H),8.20(d,J=9.0Hz,1H);13C NMR(75MHz,CDCl3)δ51.0,103.0,108.9,113.0,113.8,119.5,122.1,122.3,134.9,164.5;MS(EI)m/z 209(58.38)[M]+,178(100);HRMS(EI)calcd for C10H8NO2Cl 209.0244,Found 209.0245;mp:57-59℃.
P3:ethyl 3-chloroindolizine-1-carboxylate
3-氯中氮茚-1-甲酸乙酯
乙酸乙酯/石油醚=1/10,v/v;白色固体,56%产率。IR(film)2981,1697,1510,1298,1223,1052,773,737cm-1;1H NMR(300MHz,CDCl3)δ1.40(t,J=7.2Hz,3H),4.36(q,J=7.2Hz,2H),6.84(dd,J=6.6,6.9Hz,1H),7.06-7.11(m,1H),7.19(s,1H),8.05(d,J=7.2Hz,1H),8.20(d,J=9.0Hz,1H);13C NMR(75MHz,CDCl3)δ14.5,59.7,103.5,108.9,113.0,113.9,119.7,122.0,122.3,134.9,164.2;MS(EI)m/z 223(88.80)[M]+,178(100);HRMS(EI)calcd forC11H10NO2Cl 223.0400,Found 223.0407.
P4:tert-butyl 3-chloroindolizine-1-carboxylate
3-氯中氮茚-1-甲酸叔丁酯
乙酸乙酯/石油醚=1/15,v/v;液体,39%产率。IR(film)2977,1694,1510,1299,1239,1168,775,737cm-1;1H NMR(300MHz,CDCl3)δ1.62(s,9H),6.83(dd,J=6.6,6.9Hz,1H),7.03-7.09(m,1H),7.15(s,1H),8.04(d,J=7.2Hz,1H),8.17(d,J=9.3Hz,1H);13C NMR(75MHz,CDCl3)δ28.5,80.0,105.1,108.6,112.8,114.1,119.7,121.6,122.3,134.6,163.8;MS(EI)m/z 251(14.01)[M]+,195(100);HRMS(EI)calcd for C13H14NO2Cl 251.0713,Found 251.0715.
P5:allyl 3-chloroindolizine-1-carboxylate
3-氯中氮茚-1-甲酸烯丙酯
乙酸乙酯/石油醚=1/16,v/v;液体,51%产率。IR(film)1698,1510,1298,1218,1043,772,238cm-1;1H NMR(300MHz,CDCl3)δ4.82(dt,J=5.4,1.5Hz,2H),5.25-5.44(m,2H),6.00-6.13(m,1H),6.84(ddd,J=6.6,6.9,1.2Hz,1H),7.05-7.11(m,1H),7.20(s,1H),8.02-8.05(m,1H),8.18-8.22(m,1H);13C NMR(75MHz,CDCl3)δ64.4,103.0,109.0,113.1,113.9,117.6,119.6,122.2,122.3,132.9,135.1,163.7;MS(EI)m/z 235(52.32)[M]+,178(100);HRMS(EI)calcd for C12H10NO2Cl235.0400,Found 235.0399.
P6:methyl 3-chloro-7-methylindolizine-1-carboxylate
7-甲基-3-氯中氮茚-1-甲酸甲酯
乙酸乙酯/石油醚=1/16,v/v;白色固体,38%产率。IR(film)2954,1703,1512,1237,1048,770cm-1;1H NMR(300MHz,CDCl3)δ2.40(d,J=1.2Hz,3H),3.88(s,3H),6.68(dd,J=1.8,7.2Hz,1H),7.10(s,1H),7.94(d,J=7.2Hz,1H),7.92-7.98(m,2H);13C NMR(75MHz,CDCl3)21.2,50.9,101.5,108.3,113.6,115.7,118.0,121.8,133.3,135.6,164.7;MS(EI)m/z 223(71.39)[M]+,192(100);Anal.Calcd.forC11H10NO2Cl:C,59.07;H,4.51;N,6.26.Found:C,59.15;H,4.54;N,5.97.mp:49-51℃.
P7:methyl 3-chloro-2-methylindolizine-1-carboxylate
2-甲基-3-氯中氮茚-1-甲酸甲酯
乙酸乙酯/石油醚=1/16,v/v;白色固体,96%产率。IR(film)2947,1693,1502,1218,1108,778,738cm-1;1H NMR(300MHz,CDCl3)δ2.50(s,3H),3.91(s,3H),6.81(dd,J=7.2,6.6Hz,1H),7.06(dd,J=9.0,6.6Hz,1H),8.02(d,J=6.6Hz,1H),8.18(d,J=9.0Hz,1H);13C NMR(75MHz,CDCl3)δ11.3,50.6,101.8,108.3,112.5,119.3,121.9,124.2,135.0,165.3;MS(EI)m/z 223(75.50)[M]+,192(100);HRMS(EI)calcd for C11H10NO2Cl 223.0400,Found 223.0399;mp:107-109℃.
P8:methyl 3-chloro-2-phenylindolizine-1-carboxylate
2-苯基-3-氯中氮茚-1-甲酸甲酯
乙酸乙酯/石油醚=1/30,v/v;白色固体,91%产率。IR(film)2950,1681,1504,1239,1046,773,738,720,699cm-1;1H NMR(300MHz,CDCl3)δ3.72(s,3H),6.83(dd,J=6.9,6.6Hz,1H),7.08-7.13(m,1H),7.38-7.45(m,5H),8.09(d,J=6.9Hz,1H),8.27(d,J=9.0Hz,1H);13C NMR(75MHz,CDCl3)δ50.6,101.6,108.6,113.2,119.9,122.2,122.5,127.5,127.5,128.2,130.4,132.7,135.2,164.6;MS(EI)m/z 285(100)[M]+;Anal.Calcd.for C16H12NO2Cl:C,67.26;H,4.23;N,4.90.Found:C,67.37;H,4.42;N,4.73.mp:97-99℃.
P9:dimethyl 3-chloroindolizine-1,6-dicarboxylate
3-氯中氮茚-1,6-二甲酸二甲酯
乙酸乙酯/石油醚=1/8,v/v;白色固体,88%产率。IR(film)2958,1722,1695,1228,1048,776cm-1;1H NMR(300MHz,CDCl3)δ3.90(s,3H),3.97(s,3H),7.21(s,1H),7.55(d,J=9.3Hz,1H),8.14(d,J=9.3Hz,1H),8.76(s,1H);13C NMR(75MHz,CDCl3)δ51.2,52.4,104.5,110.5,115.5,116.9,119.0,121.1,126.5,135.1,164.0,165.1;MS(EI)m/z 267(82.33)[M]+,236(100);Anal.Calcd.forC12H10NO4Cl:C,53.85;H,3.77;N,5.23.Found:C,53.90;H,4.07;N,5.03;mp:125-127℃.
P10:dimethyl 3-chloroindolizine-1,2-dicarboxylate
3-氯中氮茚-1,2-二甲酸二甲酯
乙酸乙酯/石油醚=1/6,v/v;白色固体,86%产率。IR(film)3117,2953,1726,1693,1517,1218,1078,781,742cm-1;1H NMR(300MHz,CDCl3)δ3.89(s,3H),3.99(s,3H),6.87-6.92(m,1H),7.11-7.16(m,1H),8.05(d,J=7.2Hz,1H),8.15(d,J=9.1Hz,1H);13C NMR(75MHz,CDCl3)δ51.4,52.7,101.8,109.4,114.1,119.6,120.0,122.4,123.4,134.3,163.4,164.5;MS(EI)m/z 267(90.54)[M]+,236(100);Anal.Calcd.for C12H10NO4Cl:C,53.85;H,3.77;N,5.23.Found:C,53.86;H,3.99;N,5.07;mp:79-81℃.
P11:12-chloro-6H-chromeno[3,4-a]indolizin-6-one
乙酸乙酯/石油醚=1/10,v/v;白色固体,90%产率。IR(film)1725,1507,1413,1168,993,749,735cm-1;1H NMR(300MHz,CDCl3)δ7.06(dd,J=6.6,6.6Hz,1H),7.24-7.43(m,4H),8.19(d,J=6.6Hz,1H),8.24-8.30(m,1H);13C NMR(75MHz,CDCl3)δ96.3,102.2,115.0,115.2,117.5,119.3,120.6,122.1,123.6,123.8,123.9,129.3,133.7,152.2,157.9;MS(EI)m/z 269(100)[M]+;HRMS(EI)calcd forC15H8NO2Cl 269.0244,Found 269.0250;mp:274-276℃.
P12:1-(3-chloroindolizin-1-yl)ethanone
3-氯中氮茚-1-乙酮
乙酸乙酯/石油醚=1/5,v/v;白色固体,77%产率。IR(film)1638,1495,1297,1218,920,767,627cm-1;1H NMR(300MHz,CDCl3)δ2.50(s,3H),6.91(dd,J=6.3,6.0Hz,1H),7.09(s,1H),7.16(dd,J=7.8,7.5Hz,1H),8.05(d,J=6.9Hz,1H),8.44(d,J=8.7Hz,1H);13C NMR(75MHz,CDCl3)δ27.8,108.9,112.5,113.9,114.1,120.5,122.1,123.6,134.3,192.2;MS(EI)m/z 193(48.26)[M]+,178(100);Anal.Calcd.for C10H8NOCl:C,62.03;H,4.16;N,7.23.Found:C,61.82;H,4.32;N,7.00;mp:80-82℃.
P13:3-chloroindolizine-1-carbonitrile
3-氯中氮茚-1-甲腈
乙酸乙酯/石油醚=1/10,v/v;白色固体,89%产率。IR(film)3112,2212,1512,1301,1243,740cm-1;1H NMR(300MHz,CDCl3)δ6.92(dd,J=6.6,7.5Hz,1H),6.98(s,1H),7.14(dd,J=9.0,7.2Hz,1H),7.67(d,J=8.7Hz,1H),8.10(d,J=7.5Hz,1H);13C NMR(75MHz,CDCl3)δ81.5,109.2,113.6,114.2,115.8,117.7,122.3,122.7,137.1;MS(EI)m/z 176(100)[M]+;HRMS(EI)calcd for C9H5N2Cl 176.0141,Found 176.0135;mp:133-135℃.
P14:3-chloro-N-methylindolizine-1-carboxamide
N-甲基-3-氯中氮茚-1-甲酰胺
乙酸乙酯/石油醚=3/2,v/v;白色固体,78%产率。IR(film)3341,3106,1633,1566,1302,1246,1008,769,723cm-1;1H NMR(300MHz,CDCl3)δ2.99(d,J=4.8Hz,3H),6.20(br,1H),6.78(dd,J=6.6,6.6Hz,1H),6.93(s,1H),6.98(dd,J=8.7,7.2Hz,1H),7.97(d,J=6.9Hz,1H),8.36(d,J=9.0Hz,1H);13C NMR(75MHz,CDCl3)δ26.2,106.4,108.0,110.1,112.8,120.0,120.9,121.7,133.8,165.1;MS(EI)m/z 208(65.16)[M]+,178(100);Anal.Calcd.for C10H9N2OCl:C,57.57;H,4.35;N,13.43.Found:C,57.62;H,4.46;N,13.37;mp:165-167℃.
P15:N-benzyl-3-chloroindolizine-1-carboxamide
N-苄基-3-氯中氮茚-1-甲酰胺
乙酸乙酯/石油醚=1/10,v/v;白色固体,81%产率。IR(film)3306,1617,1546,1301,1268,732cm-1;1H NMR(300MHz,CDCl3)δ4.63(d,J=5.7Hz,2H),6.26(br,1H),6.80(dd,J=6.6,6.6Hz,1H),6.90(s,1H),7.00(dd,J=8.1,7.5Hz,1H),7.26-7.34(m,5H),7.99(d,J=6.6Hz,1H),8.39(d,J=9.3Hz,1H);13C NMR(75MHz,CDCl3)δ43.3,106.0,108.2,110.1,113.0,120.1,121.2,121.8,127.3,127.7,128.6,134.1,138.8,164.2;MS(EI)m/z 284(66.15)[M]+,178(100);HRMS(EI)calcd for C16H13N2OCl 284.0716,Found 284.0719;mp:141-143℃.
P16:3-chloro-N,N-dimethylindolizine-1-carboxamide
N,N-二甲基-3-氯中氮茚-1-甲酰胺
乙酸乙酯/石油醚=1/1,v/v;白色固体,55%产率。IR(film)2931,1609,1512,1301,1179,1030,770,730cm-1;1H NMR(300MHz,CDCl3)δ3.17(s,6H),6.77(dd,J=6.9,6.9Hz,1H),6.89(s,1H),6.92-6.97(m,1H),7.94(d,J=9.0Hz,1H),7.99(d,J=6.9Hz,1H);13C NMR(75MHz,CDCl3)δ37.6,106.4,107.4,112.4,112.5,119.7,120.0,121.6,133.7,166.7;MS(EI)m/z 222(43.11)[M]+,178(100);HRMS(EI)calcd for C11H11N2OCl 222.0560,Found 222.0561.
P17:3-chloro-N-methoxy-N-methylindolizine-1-carboxamide
N,-甲氧基-N-甲基-3-氯中氮茚-1-甲酰胺
乙酸乙酯/石油醚=1/5,v/v;白色固体,81%产率。IR(film)2935,1615,1506,1365,1300,986,857,762,736cm-1;1H NMR(300MHz,CDCl3)δ3.38(s,3H),3.71(s,3H),6.84(dd,J=6.6,7.2Hz,1H),7.02-7.08(m,1H),7.30(s,1H),8.04(d,J=7.2Hz,1H),8.45(d,J=9.0Hz,1H);13C NMR(75MHz,CDCl3)δ33.1,60.8,103.7,108.4,113.1,113.5,120.5,121.5,121.8,136.1,165.0;MS(EI)m/z 238(12.29)[M]+,178(100);HRMS(EI)calcd for C11H11N2O2Cl 238.0509,Found 238.0508.
P18:methyl 3-bromo-2-phenylindolizine-1-carboxylate
2-苯基-3-溴中氮茚-1-甲酸甲酯
乙酸乙酯/石油醚=1/15,v/v;白色固体,58%产率。IR(film)2947,1679,1503,1437,1238,1043,771,738,706cm-1;1H NMR(300MHz,CDCl3)δ3.71(s,3H),6.85-6.90(m,1H),7.11-7.16(m,1H),7.41-7.44(m,5H),8.16-8.19(m,1H),8.25-8.29(m,1H);13C NMR(75MHz,CDCl3)δ50.7,96.8,102.8,113.4,120.0,122.7,124.0,127.5,130.4,131.6,133.7,136.8,164.6;MS(EI)m/z 329(100)[M]+;Anal.Calcd.for C16H12NO2Br:C,58.20;H,3.66;N,4.24.Found:C,58.39;H,3.56;N,3.98;mp:126-128℃.
P19:3-bromo-N-methylindolizine-1-carboxamide
N-甲基-3-溴中氮茚-1-甲酰胺
乙酸乙酯/石油醚=10/1,v/v;白色固体,62%产率。IR(film)3340,3107,1631,1564,1396,1298,1243,1007,769,723cm-1;1H NMR(300MHz,CDCl3)δ2.99(d,J=4.8Hz,3H),6.18(br,1H),6.76-6.81(m,1H),6.96-7.00(m,1H),7.02(s,1H),8.00(d,J=7.2Hz,1H),8.35(d,J=9.0Hz,1H);13C NMR(75MHz,CDCl3)δ26.2,93.8,107.6,113.0,114.0,119.9,121.0,123.2,135.2,165.1;MS(EI)m/z 252(44.47)[M]+,224(100);HRMS(EI)calcd for C10H9N2OBr 251.9898,Found 251.9897;mp:147-149℃.
实施例2:3-氯代中氮茚类化合物与苯基硼酸在钯催化下的交叉偶联反应
氩气保护下,在一干燥的反应管中加入中氮茚(0.2mmol)、苯基硼酸(0.3mmol)、PdCl2(SPhos)2(0.004mmol)、K3PO4(0.4mmol)和甲苯(1mL),100℃下反应。TLC跟踪至反应结束后,冷至室温。反应混合物过硅藻土短柱,DCM(60mL)洗涤。滤液浓缩,残留物柱层析分离得产物;
P20:methyl 3-phenylpyrrolo[2,1-a]isoquinoline-1-carboxylate
3-苯基-7,8-苯并中氮茚-1-甲酸甲酯
乙酸乙酯/石油醚=1/30,v/v;白色固体,95%产率。IR(film)1705,1506,1201,1089,798,760cm-1;1H NMR(300MHz,CDCl3)δ3.96(s,3H),6.89(d,J=7.5Hz,1H),7.31(s,1H),7.43-7.48(m,1H),7.50-7.55(m,5H),7.60-7.65(m,2H),8.00(d,J=7.5Hz,1H),9.89(d,J=8.1Hz,1H);13C NMR(75MHz,CDCl3)δ51.4,108.5,113.4,116.3,121.7,125.9,126.5,127.1,127.5,127.5,128.0,128.1,128.8,128.9,129.1,131.1,132.6,165.8;MS(EI)m/z 301(100)[M]+;HRMS(EI)calcd forC20H15NO2 301.1103,Found 301.1102;mp:106-108℃.
P21:methyl 3-phenylindolizine-1-carboxylate
3-苯基中氮茚-1-甲酸甲酯(已知化合物:Angew Chem Int Ed 2007,46,4757)
乙酸乙酯/石油醚=1/60,v/v;白色固体,88%产率。IR(film)1687,1514,1226,1047,777,753,737,699cm-1;1H NMR(300MHz,CDCl3)δ3.92(s,3H),6.68-6.73(m,1H),7.05-7.10(m,1H),7.29(s,1H),7.37-7.43(m,1H),7.47-7.56(m,4H),8.28(dd,J=9.3,7.2Hz,2H);13C NMR(75MHz,CDCl3)δ50.9,103.8,112.6,116.0,120.1,122.3,123.3,126.4,128.0,128.6,129.1,131.1,136.4,165.4;MS(EI)m/z 251(100)[M]+;Anal.Calcd.for C16H13NO2:C,76.48;H,5.21;N,5.57.Found:C,76.44;H,5.37;N,5.33;mp:104-106℃.
P22:methyl 7-methyl-3-phenylindolizine-1-carboxylate
7-甲基-3-苯基中氮茚-1-甲酸甲酯
乙酸乙酯/石油醚=1/10,v/v;白色固体,88%产率。IR(film)2951,1687,1514,1229,1165,1050,798,752,700cm-1;1H NMR(300MHz,CDCl3)δ2.40(s,3H),3.91(s,3H),6.55(d,J=6.6Hz,1H),7.23(s,1H),7.39-7.51(m,5H),8.05(s,1H),8.20(d,J-6.3Hz,1H);13C NMR(75MHz,CDCl3)21.2,50.8,102.3,115.3,115.7,118.4,122.9,125.9,127.8,128.5,129.0,131.3,133.4,137.0,165.5;MS(EI)m/z 265(100)[M]+;HRMS(EI)calcd for C17H15NO2 265.1103,Found 265.1101;mp:107-109℃.
P23:methyl 2-methyl-3-phenylindolizine-1-carboxylate
2-甲基-3-苯基中氮茚-1-甲酸甲酯
乙酸乙酯/石油醚=1/16,v/v;白色固体,95%产率。IR(film)1688,1505,1196,1074,778,765,735,709cm-1;1H NMR(300MHz,CDCl3)δ2.45(s,3H),3.92(s,3H),6.59(dd,J=6.6,6.9Hz,1H),6.99-7.04(m,1H),7.38-7.53(m,5H),7.94(d,J=6.9Hz,1H),8.22(d,J=9.0Hz,1H);13C NMR(75MHz,CDCl3)δ12.1,50.5,102,3,112.0,119.6,122.1,122.9,124.4,126.0,128.2,129.0,130.3,130.6,135.9,166.2;MS(EI)m/z 265(100)[M]+;HRMS(EI)calcd for C17H15NO2 265.1103,Found 265.1104;mp:79-81℃.
P24:dimethyl 3-phenylindolizine-1,6-dicarboxylate
3-苯基中氮茚-1,6-二甲酸二甲酯
乙酸乙酯/石油醚=1/15,v/v;白色固体,93%产率。IR(film)2958,1717,1696,1440,1268,1236,1052,780,755,697cm-1;1H NMR(400MHz,CDCl3)δ3.89(s,3H),3.92(s,3H),7.33(s,1H),7.42-7.47(m,1H),7.52-7.56(m,5H),8.21(dd,J=1.2,9.6Hz,1H),8.99(dd,J=1.6,1.2Hz,1H);13C NMR(100MHz,CDCl3)δ51.1,52.2,105.2,116.4,117.5,119.3,121.1,127.7,127.8,128.4,128.6,129.2,130.2,136.3,164.8,165.5;MS(EI)m/z 309(100)[M]+;Anal.Calcd.for C18H15NO4:C,69.89;H,4.89;N,4.53.Found:C,69.86;H,4.80;N,4.35;mp:164-166℃.
P25:1-(3-phenylindolizin-1-yl)ethanone
3-苯基中氮茚-1-乙酮
乙酸乙酯/石油醚=1/8,v/v;白色固体,88%产率。IR(film)1622,1506,1219,921,753,702cm-1;1H NMR(300MHz,CDCl3)δ2.56(s,3H),6.77(dd,J=6.6,6.6Hz,1H),7.13-7.16(m,1H),7.19(s,1H),7.40-7.56(m,5H),8.29(d,J=7.2Hz,1H),8.53(d,J=9.0Hz,1H);13C NMR(75MHz,CDCl3)δ28.0,113.4,113.6,116.4,121.0,123.2,123.8,126.3,128.1,128.6,129.1,131.0,135.8,193.0;MS(EI)m/z 235(61.12)[M]+,220(100);Anal.Calcd.for C16H13NO:C,81.68;H,5.57;N,5.95.Found:C,81.41;H,5.63;N,5.78;mp:116-118℃.
P26:3-phenylindolizine-1-carbonitrile
3-苯基中氮茚-1-甲腈
乙酸乙酯/石油醚=1/15,v/v;白色固体,87%产率。IR(film)2213,1512,811,771,748,694cm-1;1H NMR(300MHz,CDCl3)δ6.75(dd,J=6.6,7.2Hz,1H),7.06(s,1H),7.07-7.12(m,1H),7.42-7.49(m,1H),7.51-7.53(m,4H),7.70(d,J=9.0Hz,1H),8.29(d,J=7.2Hz,1H);13C NMR(75MHz,CDCl3)δ82.0,113.0,116.1,116.9,118.0,122.3,123.6,126.8,128.5,129.2,130.0,138.3;MS(EI)m/z 218(100)[M]+;Anal.Calcd.for C15H10N2:C,82.55;H,4.62;N,12.84.Found:C,82.42;H,4.51;N,12.70;mp:93-95℃.
P27:N-methyl-3-phenylindolizine-1-carboxamide
N-甲基-3-苯基中氮茚-1-甲酰胺
乙酸乙酯/石油醚=1/2,v/v;白色固体,82%产率。IR(film)3298,2927,1612,1556,1292,1010,773,745,699cm-1;1H NMR(300MHz,CDCl3)δ3.03(s,3H),5.96(br,1H),6.65(dd,J=6.6,6.9Hz,1H),6.94(s,1H),6.97-7.02(m,1H),7.37-7.42(m,1H),7.47-7.54(m,4H),8.25(d,J=6.9Hz,1H),8.43(d,J=9.3Hz,1H);13C NMR(75MHz,CDCl3)δ26.2,107.0,112.0,112.4,120.6,121.3,122.7,125.7,127.9,128.5,129.1,131.3,135.3,165.8;MS(EI)m/z 250(62.65)[M]+,220(100);HRMS(EI)calcd for C16H14N2O 250.1106,Found 250.1102;mp:162-164℃.
Claims (3)
2.根据权利要求1所述的合成3-卤代中氮茚类化合物的方法,其特征是所述的中氮茚类化合物和卤化铜的摩尔比为1∶1.5。
3.如权利要求1所述的合成3-卤代中氮茚类化合物的方法,其特征是所得产物经过重结晶,薄层层析,柱层析或减压蒸馏加以分离。
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