CN107868087A - 一种制备吡咯并吲哚类衍生物的方法 - Google Patents

一种制备吡咯并吲哚类衍生物的方法 Download PDF

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CN107868087A
CN107868087A CN201710840158.3A CN201710840158A CN107868087A CN 107868087 A CN107868087 A CN 107868087A CN 201710840158 A CN201710840158 A CN 201710840158A CN 107868087 A CN107868087 A CN 107868087A
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analog derivative
pyrrolo
indole analog
indole
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CN107868087B (zh
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王杭祥
马学骥
汪海燕
谢海洋
周琳
郑树森
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Zhejiang University ZJU
Third Peoples Hospital of Shenzhen
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Third Peoples Hospital of Shenzhen
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    • C07D487/02Heterocyclic compounds containing nitrogen atoms as the only ring hetero atoms in the condensed system, not provided for by groups C07D451/00 - C07D477/00 in which the condensed system contains two hetero rings
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Abstract

本发明公开了一种制备吡咯并吲哚类衍生物的方法,在有机溶剂中,用四羧酸二铑作催化剂,以N‑磺酰基‑1,2,3‑三唑类化合物与3‑亚甲基吲哚‑2‑酮衍生物为底物,合成吡咯并吲哚类衍生物。本发明方法原料制备方法简单,容易保存,用少量商品铑催化剂,可大大降低成本。本发明方法可用于合成一系列吡咯并吲哚类衍生物,合成的产物具有潜在的生物活性。

Description

一种制备吡咯并吲哚类衍生物的方法
技术领域
本发明涉及有机合成领域,具体涉及一种制备吡咯并吲哚类衍生物的方法。
背景技术
吡咯并吲哚类化合物是一类重要的有机杂环化合物,在医药、除草剂以及光敏材料中都有重要的应用,如临床使用的吡咯并吲哚类化合物毒扁豆碱为抗胆碱酯酶药,有缩瞳、降低眼压作用;Toshiwo Andoh小组(Leptosins isolated from marine fungus:Leptoshaeria species inhibit DNA topoisomerases I and/or II and induceapoptosis by inactivation of Akt/protein kinase B.Cancer Sci.2005,96,816-824.)报道了吡咯并吲哚类衍生物来普生甙对DNA拓扑异构酶的抑制作用和抗癌活性;以及(Bionectins A-C,Epidithiodioxopiperazines with Anti-MRSA Activity,fromBionectra byssicola F120.J.Nat.Prod.2006,69,1816-1819.)吡咯并吲哚类化合物的抗微生物活性的研究。目前,为适应药物筛选及构效关系的研究,需要建立以吡咯并吲哚为结构核心的化合物库,因此,发展新的高效合成方法有重要的意义。
传统的合成吡咯并吲哚类衍生物的方法主要包括以2-,或3-取代的吲哚为原料的分子内成环反应(Chem.Rev.2012,112,3508-3549;Chem.Soc.Rev.2010,39,4449-4465.)及吲哚衍生物与偶极子的[m+n]环加成反应(J.Am.Chem.Soc.2015,137,14858-14860;J.Am.Chem.Soc.2010,132,14418-14420.)。但是这两种合成方法的原料合成过程较复杂,在新生成的吡咯环上引入取代基较困难,收率不高。
近年来,N-磺酰基-1,2,3-三唑可由铜催化的端炔与磺酰基叠氮的环加成反应得到,收率高,反应条件温和,操作方便(Efficient Synthesis of 1-Sulfonyl-1,2,3-triazoles.Org.Lett.2010,12,4952–4955)。过渡金属铑(II)催化剂可以催化三唑的开环脱氮形成活泼的α-亚胺基金属卡宾中间体,并作为新型C-C-N三元合成子参与杂环的合成(Chem.Soc.Rev.2014,43,5151-5162;Chem.-Eur.J.2016,50,17910-17924.)。由铑催化的N-磺酰基-1,2,3-三唑类化合物合成吡咯并吲哚类衍生物未见报道。
发明内容
本发明提供一种四羧酸二铑催化的制备吡咯并吲哚类衍生物的方法,原料易得,制备方法简单。
一种制备吡咯并吲哚类类衍生物方法,包括:在有机溶剂环境中,用四羧酸二铑作催化剂,以N-磺酰基-1,2,3-三唑类化合物与3-亚甲基吲哚-2-酮衍生物为原料一步合成具有下列化学式(I)的吡咯并吲哚类衍生物:
所述的N-磺酰基-1,2,3-三唑类化合物具有化学式(II)的结构:
所述的3-亚甲基吲哚-2-酮衍生物具有化学式(III)的结构:
化学式(I)~(III)中,R1为碳原子数为1~12的饱和的烷基、芳基、取代芳基、杂芳基;R2为芳基、取代芳基或碳原子数为1~6的饱和的烷基;R3为芳基、取代芳基、杂芳基或碳原子数为1~6的饱和的烷基;R4为碳原子数为1~6的饱和的烷基、卤原子、甲氧基及酯基等;其中,R1、R2和R3中的芳基上的取代基独立地选自卤素、CF3、CN、C1~C4烷基或C1~C4烷酰基。作为优选,所述的芳基为苯基;所述的杂芳基为噻吩基或呋喃基。
作为优选,R1、R2和R3中的芳基上的取代基独立地选自卤素原子、CF3、CN、烷基(优选为甲基)、甲氧酰基或甲酰基。
优选地,所述的N-磺酰基-1,2,3-三唑类化合物中R1为吸电子的基团,3-亚甲基吲哚-2-酮衍生物中苯环上6-位有一个吸电子基取代以提高反应收率。
作为优选,所述卤原子优选为F、Cl、Br、I。
作为优选,所述R1为苯基、取代苯基、C1~C5的烷基,其中取代基为F。
作为优选,所述R2为苯基、取代苯基,其中取代基为甲基。
作为优选,所述R3为苯基、取代苯基、噻吩基,其中取代基为Cl、甲基;
作为优选,所述R4为H、Cl、Br、甲氧基、甲氧酰基。
本发明中,所述的N-磺酰基-1,2,3-三唑类化合物与所述的3-亚甲基吲哚-2-酮衍生物的摩尔比为0.8:1~4:1,进一步优选为1:1~2:1;所述的四羧酸二铑催化与所述的N-磺酰基-1,2,3-三唑类化合物的摩尔比为0.005~0.04:1,进一步优选为(0.02~0.04):1,以提高反应的产率。
本发明中,所用的催化剂为商业产品,而且催化剂的用量较小,所述的金属催化剂为四乙酸二铑、四辛酸二铑、四特戊酸二铑中的一种或多种;进一步优选为四辛酸二铑。
本发明中,所述的合成的温度为60~130℃;所述的合成的时间为1~6h。一般情况下,反应时间为3小时即可使底物完全转化,少数活性低的底物,适当延长反应时间,升高反应温度有利于反应进行彻底,可以提高原料的转化率。反应温度过高,反应时间过长,不利于反应的实际应用,所述的合成的温度优选为80~110℃,进一步优选为75~85℃,更优选为80℃。
本发明中,所述的有机溶剂为二氯甲烷、三氯甲烷、甲苯、乙酸乙酯、1,2-二氯乙烷中的一种或多种,优选1,2-二氯乙烷。
本发明中,所述的合成的反应方程式为:
其中,R1为碳原子数为1~12的饱和的烷基、芳基、取代芳基、杂芳基;R2为芳基、取代芳基或碳原子数为1~6的饱和的烷基;R3为芳基、取代芳基、杂芳基或碳原子数为1~6的饱和的烷基;R4为碳原子数为1~6的饱和的烷基、卤原子、甲氧基及酯基等;其中,R1、R2和R3中的芳基上的取代基独立地选自卤素、CF3、CN、C1~C4烷基或C1~C4烷酰基。
与现有技术相比,本发明具有以下优点:
本发明方法以N-磺酰基-1,2,3-三唑类化合物和3-亚甲基吲哚-2-酮衍生物反应得到吡咯并吲哚类衍生物,原料廉价易得,制备方法简单,铑催化剂用量少,可大大降低成本。本发明方法可用于合成一系列吡咯并吲哚类衍生物,合成的产物具有潜在生物活性。
具体实施方式
下面结合实施例来详细说明本发明,但本发明并不仅限于此。
实施例1
在干燥的15mL耐压反应管中,加入90mg的4-苯基-N-对甲苯磺酰基1,2,3-三氮唑、44mg 3-苄亚甲基吲哚-2-酮、7.0mg的辛酸铑和1.0mL的1,2-二氯乙烷。在氮气下,80℃搅拌反应3小时。反应结束冷却至室温,直接过硅胶柱(石油醚与乙酸乙酯的体积比为10:1),得到产物50mg,产率51%,反应过程如下式所示:
对本实施例制备得到的产物进行核磁共振及质谱分析:
1H NMR(400MHz,CDCl3):δ=8.85(s,1H),7.78(d,J=7.2Hz,2H),7.61(d,J=8.0Hz,2H),7.57(d,J=7.2Hz,1H),7.38-7.42(m,3H),7.22(s,1H),7.13(dt,J=7.2,1.6Hz,2H),6.92-7.00(m,5H),6.44(d,J=7.2Hz,2H),5.14(d,J=5.2Hz,1H),4.46(d,J=5.2Hz,1H),2.43(s,3H);
13C NMR(100MHz,CDCl3):δ=194.0,145.1,141.3,141.2,138.5,134.3,133.8,131.5,130.3,129.6,129.1,128.7,128.5,128.0,127.1,121.2,120.8,117.8,112.2,104.5,80.3,48.6,21.6;
HRMS(ESI,m/z):calcd.for C30H25N2O3S+(M+H)+:requires 493.1580,found:493.1582.
实施例2
在干燥的15mL耐压反应管中,加入90mg的4-苯基-N-对甲苯磺酰基1,2,3-三氮唑、47mg 3-(4-甲基苄亚甲基)吲哚-2-酮、7.0mg的辛酸铑和1.0mL的1,2-二氯乙烷。在氮气下,80℃搅拌反应3小时。反应结束冷却至室温,直接过硅胶柱(石油醚与乙酸乙酯的体积比为10:1),得到产物65mg,产率64%,反应过程如下式所示:
对本实施例制备得到的产物进行核磁共振及质谱分析:
1H NMR(600MHz,CDCl3):δ=8.81(s,1H),7.79(d,J=7.8Hz,2H),7.61(d,J=7.2Hz,2H),7.58(t,J=7.2Hz,1H),7.39-7.42(m,3H),7.24(d,J=7.2Hz,2H),7.12(t,J=7.2Hz,1H),6.97(t,J=7.2Hz,1H),6.94(t,J=7.8Hz,1H),6.79(d,J=7.2Hz,2H),6.32(d,J=7.2Hz,2H),5.12(d,J=4.2Hz,1H),4.43(d,J=4.2Hz,1H),2.43(s,3H),2.25(s,3H);
13C NMR(150MHz,CDCl3):δ=194.0,145.1,141.1,138.4,138.2,136.9,134.3,133.7,131.5,130.3,129.2,129.1,128.7,128.0,127.2,123.6,121.1,120.8,117.8,112.1,104.6,80.4,48.4,21.6,21.1;
HRMS(ESI,m/z):calcd.for C31H27N2O3S+(M+H)+:requires 507.1736,found:507.1740.
实施例3
在干燥的15mL耐压反应管中,加入90mg的4-苯基-N-对甲苯磺酰基1,2,3-三氮唑、51mg 3-(4-氯苄亚甲基)吲哚-2-酮、7.0mg的辛酸铑和1.0mL的1,2-二氯乙烷。在氮气下,80℃搅拌反应3小时。反应结束冷却至室温,直接过硅胶柱(石油醚与乙酸乙酯的体积比为9:1),得到产物49mg,产率47%,反应过程如下式所示:
对本实施例制备得到的产物进行核磁共振及质谱分析:
1H NMR(600MHz,CDCl3):δ=8.90(s,1H),7.79(d,J=7.8Hz,2H),7.58-7.60(m,3H),7.41-7.44(m,3H),7.23(d,J=7.8Hz,2H),7.14(t,J=7.2Hz,1H),7.00(t,J=7.2Hz,1H),6.92-6.97(m,3H),6.40(d,J=7.8Hz,2H),5.09(d,J=4.8Hz,1H),4.44(d,J=4.8Hz,1H),2.43(s,3H);
13C NMR(150MHz,CDCl3):δ=194.0,145.4,141.4,139.9,138.5,133.9,133.1,131.3,130.3,129.1,128.8,128.7,128.6,127.9,123.4,121.4,121.0,117.7,112.3,103.9,80.2,47.9,21.6;
HRMS(ESI,m/z):calcd.for C30H24ClN2O3S+(M+H)+:requires 527.1190,found:527.1189.
实施例4
在干燥的15mL耐压反应管中,加入90mg的4-苯基-N-对甲苯磺酰基1,2,3-三氮唑、50mg 3-(2-噻吩亚甲基)吲哚-2-酮、7.0mg的辛酸铑和1.0mL的1,2-二氯乙烷。在氮气下,80℃下搅拌反应3小时。反应结束冷却至室温,直接过硅胶柱(石油醚与乙酸乙酯的体积比为8:1),得到产物70mg,产率70%,反应过程如下式所示:
对本实施例制备得到的产物进行核磁共振及质谱分析:
1H NMR(600 MHz,CDCl3):δ=8.88(s,1H),7.88(d,J=7.8Hz,2H),7.58-7.62(m,3H),7.45(d,J=7.8Hz,2H),7.40(d,J=8.4Hz,1H),7.20(d,J=7.8Hz,2H),7.13(d,J=7.8Hz,1H),7.07(d,J=7.8Hz,1H),7.01-7.04(m,2H),6.69(t,J=3.6Hz,1H),5.26(s,br,1H),5.29(d,J=4.8Hz,1H),4.74(d,J=4.8Hz,1H),2.38(s,3H);
13C NMR(150MHz,CDCl3):δ=193.6,1455,145.2,141.1,138.3,134.3,133.9,131.4,130.3,129.1,128.8,127.9,126.7,124.9,123.4,121.3,120.9,117.8,112.2,104.4,80.0,43.5,21.6;
HRMS(ESI,m/z):calcd.for C28H23N2O3S2 +(M+H)+:requires 499.1144,found:499.1143.
实施例5
在干燥的15mL耐压反应管中,加入90mg的4-苯基-N-对甲苯磺酰基1,2,3-三氮唑、51mg 3-苄亚甲基-6-氯吲哚-2-酮、7.0mg的辛酸铑和1.0mL的1,2-二氯乙烷。在氮气下,80℃搅拌反应3小时。反应结束冷却至室温,直接过硅胶柱(石油醚与乙酸乙酯的体积比为8:1),得到产物96mg,产率91%,反应过程如下式所示:
对本实施例制备得到的产物进行核磁共振及质谱分析:
1H NMR(600MHz,CDCl3):δ=9.00(s,br,1H),7.77(d,J=7.2Hz,2H),7.61(d,J=7.2Hz,2H),7.59(t,J=7.2Hz,1H),7.38-7.42(m,3H),7.25(d,J=7.2Hz,2H),7.14(d,J=7.2Hz,1H),6.99(t,J=7.2Hz,2H),6.92(d,J=7.8Hz,1H),6.80(d,J=7.8Hz,1H),6.39(d,J=7.2Hz,2H),5.21(d,J=4.8Hz,1H),4.41(d,J=4.8Hz,1H),2.44(s,3H);
13C NMR(150MHz,CDCl3):δ=193.8,145.3,141.8,140.9,138.8,134.2,133.9,131.4,130.4,129.1,128.8,128.6,127.9,127.4,127.2,126.8,122.0,121.4,118.3,112.3,104.4,79.9,48.5,21.6;
HRMS(ESI,m/z):calcd.for C30H24ClN2O3S+(M+H)+:requires 527.1190,found:527.1191.
实施例6
在干燥的15mL耐压反应管中,加入90mg的4-苯基-N-对甲苯磺酰基1,2,3-三氮唑、59mg 3-苄亚甲基-6-溴吲哚-2-酮、7.0mg的辛酸铑和1.0mL的1,2-二氯乙烷。在氮气下,80℃搅拌反应3小时。反应结束冷却至室温,直接过硅胶柱(石油醚与乙酸乙酯的体积比为8:1),得到产物77mg,产率68%,反应过程如下式所示:
对本实施例制备得到的产物进行核磁共振及质谱分析:
1H NMR(600MHz,CDCl3):δ=8.96(s,1H),7.67(d,J=7.2Hz,2H),7.58-7.62(m,3H),7.54(s,1H),7.41(t,J=7.2Hz,2H),7.25(d,J=6.0Hz,2H),7.13(t,J=7.2Hz,1H),7.07(d,J=7.8Hz,1H),6.99(t,J=7.2Hz,2H),6.76(d,J=8.4Hz,1H),6.41(d,J=6.6Hz,2H),5.20(d,J=3.6Hz,1H),4.41(d,J=3.6Hz,1H),2.43(s,3H);
13C NMR(150MHz,CDCl3):δ=193.8,145.3,141.7,140.9,139.1,134.2,133.9,131.5,130.4,129.1,128.8,128.6,128.0,127.4,127.2,124.1,122.4,118.8,115.1,114.2,104.4,80.0,48.5,21.6;
HRMS(ESI,m/z):calcd.for C30H24BrN2O3S+(M+H)+:requires 571.0685,found:571.0688.
实施例7
在干燥的15mL耐压反应管中,加入90mg的4-苯基-N-对甲苯磺酰基1,2,3-三氮唑、56mg 3-苄亚甲基-2氧化吲哚-6-甲酸甲酯、7.0mg的辛酸铑和1.0mL的1,2-二氯乙烷。在氮气下,80℃搅拌反应3小时。反应结束冷却至室温,直接过硅胶柱(石油醚与乙酸乙酯的体积比为6:1),得到产物90mg,产率82%,反应过程如下式所示:
对本实施例制备得到的产物进行核磁共振及质谱分析:
1H NMR(600MHz,CDCl3):δ=9.12(s,1H),8.16(s,1H),7.77(d,J=7.8Hz,2H),7.68(d,J=8.4Hz,1H),7.63(d,J=7.2Hz,2H),7.60(t,J=6.6Hz,1H),7.42(t,J=7.2Hz,2H),7.26(d,J=6.0Hz,2H),7.15(t,J=7.2Hz,1H),7.01(t,J=6.6Hz,2H),6.91(d,J=8.4Hz,1H),6.43(d,J=7.2Hz,2H),5.27(d,J=3.6Hz,1H),4.44(d,J=3.6Hz,1H),3.92(s,3H),2.44(s,3H);
13C NMR(150MHz,CDCl3):δ=193.6,167.8,145.4,144.2,140.8,137.7,134.2,133.9,131.9,130.4,129.1,128.8,128.6,127.9,127.5,127.2,122.6,122.4,116.9,114.1,104.8,79.9,52.0,48.4,21.6;
HRMS(ESI,m/z):calcd.for C32H27N2O5S+(M+H)+:requires 551.1641,found:551.1642.
实施例8
在干燥的15mL耐压反应管中,加入90mg的4-苯基-N-对甲苯磺酰基1,2,3-三氮唑、50mg 3-苄亚甲基-5-甲氧基吲哚-2-酮、7.0mg的辛酸铑和1.0mL的1,2-二氯乙烷。在氮气下,80℃搅拌反应3小时。反应结束冷却至室温,直接过硅胶柱(石油醚与乙酸乙酯的体积比为8:1),得到产物46mg,产率44%,反应过程如下式所示:
对本实施例制备得到的产物进行核磁共振及质谱分析:
1H NMR(600MHz,CDCl3):δ=8.79(s,1H),7.79(d,J=7.8Hz,2H),7.56-7.61(m,3H),7.40-7.43(m,3H),7.24(d,J=7.8Hz,2H),7.13(t,J=7.2Hz,1H),6.95-7.01(m,2H),6.91(t,J=7.2Hz,1H),6.67(d,J=7.8Hz,1H),6.07(s,1H),6.04(d,J=7.2Hz,1H),5.15(d,J=4.2Hz,1H),4.44(d,J=4.2Hz,1H),3.60(s,3H),2.41(s,3H);
13C NMR(150MHz,CDCl3):δ=194.1,145.3,142.8,141.2,134.3,133.8,131.3,130.3,129.5,129.1,128.7,127.9,123.7,121.1,120.8,119.6,117.8,113.2,112.4,112.0,104.4,80.1,55.1,48.7,21.6;
HRMS(ESI,m/z):calcd.for C31H27N2O4S+(M+H)+:requires 523.1686,found:523.1688.
实施例9
在干燥的15mL耐压反应管中,加入96mg的4-(4-氟苯基)-N-对甲苯磺酰基1,2,3-三氮唑、51mg 3-苄亚甲基-6-氯吲哚-2-酮、7.0mg的辛酸铑和1.0mL的1,2-二氯乙烷。在氮气下,80℃搅拌反应3小时。反应结束冷却至室温,直接过硅胶柱(石油醚与乙酸乙酯的体积比为8:1),得到产物96mg,产率88%,反应过程如下式所示:
对本实施例制备得到的产物进行核磁共振及质谱分析:
1H NMR(600MHz,CDCl3):δ=8.95(s,1H),7.79-7.81(m,2H),7.60(d,J=7.8Hz,2H),7.39(s,1H),7.26(d,J=7.8Hz,2H),7.15(t,J=6.6Hz,1H),7.08(t,J=7.8Hz,2H),7.01(t,J=7.8Hz,2H),6.94(d,J=8.4Hz,1H),6.81(d,J=8.4Hz,1H),6.41(d,J=7.2Hz,2H),5.11(d,J=4.2Hz,1H),4.41(d,J=4.2Hz,1H),2.44(s,3H);
13C NMR(150MHz,CDCl3):δ=192.3,145.4,141.6,140.8,138.7,131.9,131.8,131.2,130.4,128.7,127.9,127.5,127.2,127.0,121.9,121.5,118.4,116.1,116.0,112.2,104.4,80.1,48.6,21.6;
HRMS(ESI,m/z):calcd.for C30H23ClFN2O3S+(M+H)+:requires 545.1096,found:545.1101.
实施例10
在干燥的15mL耐压反应管中,加入84mg的4-丁基-N-对甲苯磺酰基1,2,3-三氮唑、51mg 3-苄亚甲基-6-氯吲哚-2-酮、7.0mg的辛酸铑和1.0mL的1,2-二氯乙烷。在氮气下,80℃搅拌反应4小时。反应结束冷却至室温,直接过硅胶柱(石油醚与乙酸乙酯的体积比为10:1),得到产物74mg,产率73%,反应过程如下式所示:
对本实施例制备得到的产物进行核磁共振及质谱分析:
1H NMR(600MHz,CDCl3):δ=8.81(s,1H),7.41(s,1H),7.38(d,J=7.8Hz,2H),7.06(t,J=7.2Hz,1H),7.00-7.03(m,3H),6.94-7.00(m,3H),6.51(d,J=7.2Hz,2H),4.48(d,J=2.4Hz,1H),4.39(d,J=2.4Hz,1H),3.00-3.06(m,1H),2.75-2.79(m,1H),2.32(s,3H),1.60-1.64(m,2H),1.33-1.37(m,2H),0.92(t,J=7.2Hz,3H);
13C NMR(150MHz,CDCl3):δ=208.5,145.3,141.5,141.3,138.6,130.6,130.1,128.4,127.8,127.2,126.8,126.5,122.2,121.7,118.9,112.2,105.4,83.5,46.8,39.0,25.1,22.2,21.6,13.9;
HRMS(ESI,m/z):calcd.for C28H28ClN2O3S+(M+H)+:requires 507.1503,found:507.1502。

Claims (10)

1.一种制备吡咯并吲哚类衍生物的方法,其特征在于,在有机溶剂中,铑催化剂催化下,N-磺酰基-1,2,3-三唑类化合物与3-亚甲基吲哚-2-酮衍生物一步合成具有下列化学式(I)的吡咯并吲哚类衍生物:
所述的N-磺酰基-1,2,3-三唑类化合物具有化学式(II)所示的结构:
所述的3-亚甲基吲哚-2-酮衍生物具有化学式(III)所示的结构:
化学式(I)~(III)中,R1为碳原子数为1~12的饱和的烷基、芳基、取代芳基、杂芳基;R2为芳基、取代芳基或碳原子数为1~6的烷基;R3为芳基、取代芳基、杂芳基或碳原子数为1~6的烷基;R4为碳原子数为1~6的饱和的烷基、卤原子、甲氧基及酯基;其中,R1、R2和R3中的芳基上的取代基独立地选自卤素、CF3、CN、C1~C4烷基或C1~C4烷酰基。
2.如权利要求1所述的制备吡咯并吲哚类衍生物的方法,其特征在于,所述的芳基为苯基或者萘基;所述的杂芳基为噻吩基或呋喃基。
3.如权利要求1所述的制备吡咯并吲哚类衍生物的方法,其特征在于,R1、R2和R3中的芳基上的取代基独立地选自F、Cl、甲基。
4.如权利要求1所述的制备吡咯并吲哚类衍生物的方法,其特征在于,R4为H、Cl、Br、甲氧基、甲氧酰基。
5.如权利要求1所述的制备吡咯并吲哚类衍生物的方法,其特征在于,所述的N-磺酰基-1,2,3-三唑类化合物与所述的3-亚甲基吲哚-2-酮衍生物的摩尔比为0.8:1~4:1。
6.如权利要求1所述的制备吡咯并吲哚类衍生物的方法,其特征在于,所述的铑催化剂与所述的N-磺酰基-1,2,3-三唑类化合物的摩尔比为(0.005~0.04):1。
7.如权利要求1所述的制备吡咯并吲哚类衍生物的方法,其特征在于,反应的温度为60~130℃;反应的时间为1~6h。
8.如权利要求1所述的制备吡咯并吲哚类衍生物的方法,其特征在于,所述的催化剂为四乙酸二铑、四辛酸二铑、四特戊酸二铑中个一种或多种。
9.如权利要求1所述的制备吡咯并吲哚类衍生物的方法,其特征在于,所述的有机溶剂为二氯甲烷、三氯甲烷、甲苯、乙酸乙酯、1,2-二氯乙烷中的一种或多种。
10.如权利要求1所述的制备吡咯并吲哚类衍生物的方法,其特征在于,反应的温度为75~85℃,铑催化剂为四辛酸二铑。
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