Pentafluorophenyl ester activation for the preparation of N,N′-diaroylhydrazines
摘要:
Procedures are reported for the preparation of N,N'-diaroylhydrazines using pentafluorophenyl (Pfp) ester activation of aryl carboxylic acids. Mild conditions which avoid intermediate protection of ring substituents, allows the synthesis of both symmetrical and unsymmetrical diaroylhydrazines in high yields. The recent discovery of potent HIV-1 integrase inhibition by N,N'-bis-salicylhydrazine (1) highlights the potential importance of this class of compounds. The stability of pre-activated Pfp ester intermediates and the facility with which N,N'-diaroylhydrazines can be synthesized using this procedure (stirring at room temperature in DMF) may make the method particularly attractive for synthesis of hydrazide libraries.
Newderivatives of 4-oxo-1,2,3,4-tetrahydroquinazoline, analogs of Quin-C1, have been synthesized by the condensation of aroyl- and heteroaroylhydrazides of anthranilic acid with cinnamic, crotonic, and 4-hydroxy-3-methoxybenzoic aldehydes. The antioxidantactivity of the obtained compounds has been determined.
Synthesis of 2-R-3-Hydroxy[1,2,4]triazino[6,1-b]-quinazoline-4,10-diones
作者:L. A. Shemchuk、V. P. Chernykh、O. S. Krys’kiv
DOI:10.1134/s1070428006050186
日期:2006.5
A preparation method was developed for [1,2,4]triazino[6,1-b]quinazoline-4,10-diones using isatoic anhydride, carboxylic acids hydrazides, ethyl oxalyl chloride, and hydroxylamine.
Daidone; Raffa; Plescia, Il Farmaco, 1989, vol. 44, # 5, p. 465 - 473
Pentafluorophenyl ester activation for the preparation of N,N′-diaroylhydrazines
作者:He Zhao、Terrence R. Burke
DOI:10.1016/s0040-4020(97)00149-x
日期:1997.3
Procedures are reported for the preparation of N,N'-diaroylhydrazines using pentafluorophenyl (Pfp) ester activation of aryl carboxylic acids. Mild conditions which avoid intermediate protection of ring substituents, allows the synthesis of both symmetrical and unsymmetrical diaroylhydrazines in high yields. The recent discovery of potent HIV-1 integrase inhibition by N,N'-bis-salicylhydrazine (1) highlights the potential importance of this class of compounds. The stability of pre-activated Pfp ester intermediates and the facility with which N,N'-diaroylhydrazines can be synthesized using this procedure (stirring at room temperature in DMF) may make the method particularly attractive for synthesis of hydrazide libraries.
Pandey, Ajit K.; Kashyap, Pranita P.; Kaur, Chanchal D., Indian Journal of Heterocyclic Chemistry, 2016, vol. 26, # 3-4, p. 163 - 171