The di-tert-butyl-di-p-nitrophenyl ester of hydrazinetetracarboxylic acid was prepared and shown to be useful in the preparation of urazoles (i.e., 1,2,4-triazolidine-3,5-diones), by reaction with a primary amine using either n-BuLi or pyridine as base, depending on the desired N-4 substituent. With more electronegative N-4 substituents, pyridine is the preferred base. This work complements our reported urazole synthesis, which introduced the N-4 substituent early in the sequence and thus did not facilitate variation at N-4 for library synthesis. (C) 2013 Elsevier Ltd. All rights reserved.
Arya, V. P.; Nagarajan, K.; Shenoy, S. J., Indian Journal of Chemistry - Section B Organic and Medicinal Chemistry, 1982, vol. 21, # 10, p. 941 - 944
作者:Arya, V. P.、Nagarajan, K.、Shenoy, S. J.
DOI:——
日期:——
ARYA, V. P.;NAGARAJAN, K.;SHENOY, S. J., INDIAN J. CHEM., 1982, 21, N 10, 941-944