Faujasite catalyzed nitrodeiodination of iodopyrazoles
摘要:
Nitrodeiodination of iodopyrazoles using nitric acid/Faujasite has been investigated. The present procedure is simple, rapid and convenient and requires no sulfuric acid or oleum and may be applied for the synthesis of several nitropyrazoles in good yields in drug and pharmaceutical industries. (C) 2013 Elsevier B.V. All rights reserved.
Oxidative iodination of substituted N-methylpyrazoles
作者:S. F. Vasilevskii、M. S. Shvartsberg
DOI:10.1007/bf00949685
日期:1980.5
Silica–Sulfuric Acid Catalyzed Nitrodeiodination of Iodopyrazoles
作者:P. Ravi、Girish M. Gore、Arun K. Sikder、Surya P. Tewari
DOI:10.1080/00397911.2011.584261
日期:2012.12.1
We report here the synthesis of nitropyrazoles in good to excellent yields from iodopyrazoles over silica-sulfuric acid catalyst for the first time. The present procedure require less acid, offers a simplified workup procedure, and may be applied for the nitration of a wide variety of iodoazoles in drug and pharmaceutical industries.
Huettel, Rudolf; Schaefer, Otto; Jochum, Peter, Justus Liebigs Annalen der Chemie, 1955, vol. 593, p. 200 - 207
作者:Huettel, Rudolf、Schaefer, Otto、Jochum, Peter
DOI:——
日期:——
Synthesis of some aminopropynylpyrazoles
作者:S. F. Vasilevskii、P. A. Slabuka、E. G. Izyumov、M. S. Shvartsberg、I. L. Kotlyarevskii
DOI:10.1007/bf00850092
日期:1972.11
Nitrodeiodination of 4-iodo-l-methylpyrazoles
作者:E. V. Tret'yakov、S. F. Vasitevsky
DOI:10.1007/bf01431120
日期:1996.11
4-Iodo-1-methylpyrazoles react with a nitrating mixture at 55 degrees C to give the corresponding 4-nitro-1-methylpyrazoles. The qualitative dependence of the nitrodeiodination rate on the structure of the heterocycles and the reaction conditions was considered.