Cyclization of 1,2,4-triazenes to 1,2,4-triazoles using oxidizing reagents—NaClO, Ca(ClO)2, Dess–Martin periodinane and Ley's TPAP/NMO
摘要:
A simple and efficient approach to 1,3,5-trisubstituted 1,2,4-triazoles via cyclization of 1,2,4-triazenes employing commonly used oxidizing agents such as NaClO, Ca(ClO)(2), Dess-Martin periodinane and Ley's oxidizing agent (TPAP/NMO) is described. The reaction proceeds under mild conditions and is compatible with various functional groups. Extension of this approach to prepare triazoles on solid support has also been investigated. (C) 2001 Elsevier Science Ltd. All rights reserved.
Design and synthesis of 1,3,5-trisubstituted 1,2,4-triazoles as CYP enzyme inhibitors
作者:Yaseen A. Al-Soud、Michael Heydel、Rolf W. Hartmann
DOI:10.1016/j.tetlet.2011.09.049
日期:2011.11
5-trisubstituted 1,2,4-triazoles was designed and synthesized as potential inhibitors of steroidogenic CYP enzymes. The 1,2,4-triazole is part of the core structure fixing the geometry of the substances. A pyridine moiety was introduced as heme-binder. The target compounds were synthesized in two to four steps using silver carbonate mediated ring closure and Suzuki cross coupling reaction as key synthetic
An Improved Synthesis of 1,2,4-Triazoles using Ag2CO3
作者:K Paulvannan、Tao Chen、Ron Hale
DOI:10.1016/s0040-4020(00)00726-2
日期:2000.10
An improved synthesis of 1,3,5-trisubstituted 1,2,4-triazoles via Ag2CO3 mediated cyclization of triazenes has been developed. This approach is flexible and compatible with a wide range of functional groups. The reaction was complete within 3 h and the products were isolated in moderate to high yields. The influence of the beta-substituents of the amines on the triazole formation was also studied. (C) 2000 Elsevier Science Ltd. All rights reserved.