One-pot synthesis of 5-amino 4-cyano pyrrole derivatives
摘要:
One-pot synthesis of 5-amino 4-cyano pyrrole derivatives is herein disclosed. The described method consists of four steps and gives new pyrrole derivatives in moderate to good yields. This synthesis can be used for a large scale preparation. (C) 2011 Elsevier Ltd. All rights reserved.
A one-pot, three-component, microwave-assisted synthesis of novel 7-amino-substituted 4-aminopyrazolo[1,5-a][1,3,5]triazine-8-carbonitriles
作者:Felicia Phei Lin Lim、Giuseppe Luna、Anton V. Dolzhenko
DOI:10.1016/j.tetlet.2015.11.006
日期:2015.12
The synthesis of novel 7-amino-substituted pyrazolo[1,5-a][1,3,5]triazine-8-carbonitriles was achieved via a three-component reaction of 3-amino-substituted 5-aminopyrazole-4-carbonitriles, cyanamide and triethyl orthoformate under microwave irradiation. Under catalyst-free conditions, this three-component reaction accommodated a generous diversity of amino substituents making it ideal for the generation
新型7-氨基取代的吡唑并[1,5- a ] [1,3,5]三嗪-8-腈的合成是通过3-氨基取代的5-氨基吡唑-4-腈的三组分反应实现的,微波辐射下的氰胺和原甲酸三乙酯。在无催化剂的条件下,该三组分反应可容纳大量的氨基取代基,因此非常适合用于药物开发过程的化合物库的生成。
Several thieno[3,2-b]pyridines could be easily synthesized by methallation using LDA directly from 3-(disubstituted amino)-2-cyano-3-methylthioacrylonitriles.
In this work, we described the synthesis of new tetrasubstituted thiophenes and selenophenes achieved by an easy one-pot four-step procedure. Expected compounds were obtained in good yield from ketene dithioacetals.
A new series of multi-functionalised 1,1′-carbonylbispyrazole derivatives were synthesised through cyclisation of pyrazole carbohydrazides with some substituted methylene malononitriles in very good yields. The structures of all synthesised compounds were established on the basis of NMR, IR, MS and elemental analysis.