Microwave-assisted cycloadditions of 2-alkynylbenzonitriles with sodium azide: selective synthesis of tetrazolo[5,1-a]pyridines and 4,5-disubstituted-2H-1,2,3-triazoles
摘要:
Under microwave irradiation (75 W), treatment of 2-alkynylbenzonitriles with 1.5 equiv of sodium azide in DMSO at 140 degrees C gave 4,5-disubstituted-2H-1,2,3-triazoles in 60-99% yields. Additionally, adding 8 equiv of ZnBr2 and using 8 equiv of sodium azide in DMF at 100 degrees C lead to the formation of tetrazolo[5,1-a]isoquinolines up to 87% yield. (C) 2009 Elsevier Ltd. All rights reserved.
作为专题“现代合成中的环化策略”的一部分发布 抽象的 据报道,Hg(OTf)2催化硝基炔的环化反应,以高收率和高选择性产生相应的苯并[ c ]异恶唑。在这种策略的基础上,开发了一种一锅合成吲哚衍生物的方法。在该转化中,提出了涉及两个Hg-卡宾中间体。 据报道,Hg(OTf)2催化硝基炔的环化反应,以高收率和高选择性产生相应的苯并[ c ]异恶唑。在这种策略的基础上,开发了一种一锅合成吲哚衍生物的方法。在该转化中,提出了涉及两个Hg-卡宾中间体。
One-Pot Synthesis of Indole Derivatives from the Reaction of Nitroalkynes and Alkynes via a Mercury-Carbene Intermediate
作者:Shifa Zhu、Min Zheng、Kai Chen
DOI:10.1055/s-0036-1588416
日期:2017.9
Published as part of the Special Topic Modern Cyclization Strategies in Synthesis Abstract The cyclization of nitroalkyne catalyzed by Hg(OTf)2 to produce the corresponding benzo[c]isoxazole in excellent yields with high selectivity is reported. On the basis of this strategy, a one-pot method to synthesize indolederivatives has been developed. In this transformation, two Hg-carbene intermediates are
作为专题“现代合成中的环化策略”的一部分发布 抽象的 据报道,Hg(OTf)2催化硝基炔的环化反应,以高收率和高选择性产生相应的苯并[ c ]异恶唑。在这种策略的基础上,开发了一种一锅合成吲哚衍生物的方法。在该转化中,提出了涉及两个Hg-卡宾中间体。 据报道,Hg(OTf)2催化硝基炔的环化反应,以高收率和高选择性产生相应的苯并[ c ]异恶唑。在这种策略的基础上,开发了一种一锅合成吲哚衍生物的方法。在该转化中,提出了涉及两个Hg-卡宾中间体。
Microwave-assisted cycloadditions of 2-alkynylbenzonitriles with sodium azide: selective synthesis of tetrazolo[5,1-a]pyridines and 4,5-disubstituted-2H-1,2,3-triazoles
Under microwave irradiation (75 W), treatment of 2-alkynylbenzonitriles with 1.5 equiv of sodium azide in DMSO at 140 degrees C gave 4,5-disubstituted-2H-1,2,3-triazoles in 60-99% yields. Additionally, adding 8 equiv of ZnBr2 and using 8 equiv of sodium azide in DMF at 100 degrees C lead to the formation of tetrazolo[5,1-a]isoquinolines up to 87% yield. (C) 2009 Elsevier Ltd. All rights reserved.