Synthesis of 2H-Indazoles by the [3 + 2] Dipolar Cycloaddition of Sydnones with Arynes
摘要:
A rapid and efficient synthesis of 2H-indazoles has been developed using a [3 + 2] dipolar cycloaddition of sydnones and arynes. A series of 2H-indazoles have been prepared in good to excellent yields this protocol, and subsequent Pd-catalyzed coupling reactions can be applied to the halogenated products to generate a structurally diverse library of indazoles.
Synthesis of 2H-Indazoles by the [3 + 2] Dipolar Cycloaddition of Sydnones with Arynes
摘要:
A rapid and efficient synthesis of 2H-indazoles has been developed using a [3 + 2] dipolar cycloaddition of sydnones and arynes. A series of 2H-indazoles have been prepared in good to excellent yields this protocol, and subsequent Pd-catalyzed coupling reactions can be applied to the halogenated products to generate a structurally diverse library of indazoles.
Synthesis of 2<i>H</i>-Indazoles by the [3 + 2] Cycloaddition of Arynes and Sydnones
作者:Chunrui Wu、Yuesi Fang、Richard C. Larock、Feng Shi
DOI:10.1021/ol100586r
日期:2010.5.21
A rapid and efficient synthesis of 2H-indazoles has been developed, which involves the [3 + 2] dipolar cycloaddition of arynes and sydnones. The process proceeds under mild reaction conditions in good to excellent yields.
Pd-catalyzed oxidative coupling of monosubstituted sydnones and terminal alkynes
作者:Chunrui Wu、Pan Li、Yuesi Fang、Jingjing Zhao、Weichao Xue、Yang Li、Richard C. Larock、Feng Shi
DOI:10.1016/j.tetlet.2011.05.058
日期:2011.7
The Pd-catalyzed oxidative coupling of N-substituted sydnones and terminal alkynes offers a quick, one-step synthesis of 4-alkynylsydnones in moderate to good yields. (C) 2011 Elsevier Ltd. All rights reserved.