Facile microwave assisted decarbonylation of 4-formyl group in 5-alkyl amino substituted pyrazoles
摘要:
Facile decarbonylation of the 4-formyl group in 5-alkyl amino pyrazoles was seen when reacted with catalytic p-toluene sulfonic acid in methanol under microwave irradiation to provide parent 4-H pyrazoles in good yields. (C) 2008 Elsevier Ltd. All rights reserved.
Facile microwave assisted decarbonylation of 4-formyl group in 5-alkyl amino substituted pyrazoles
摘要:
Facile decarbonylation of the 4-formyl group in 5-alkyl amino pyrazoles was seen when reacted with catalytic p-toluene sulfonic acid in methanol under microwave irradiation to provide parent 4-H pyrazoles in good yields. (C) 2008 Elsevier Ltd. All rights reserved.
Introduction of <i>N</i>‐Containing Heterocycles into Pyrazole by Nucleophilic Aromatic Substitution
作者:Min‐Sup Park、Hyun‐Ja Park、Koon Ha Park、Kee‐In Lee
DOI:10.1081/scc-120030741
日期:2004.12.31
Abstract The nucleophilicaromaticsubstitution on 5‐chloropyrazoles activated by the electron‐withdrawing formyl group offers a useful method to introduce a wide range of N‐containing heterocycles into them. The rate of reaction was greatly affected by the electronic nature of the N‐1 substitution.