In this study, a series of new isatin aroylhydrazones (5a-e and 6a-e) was synthesized and evaluated for their anticonvulsant activities. The (Z)-configuration of compounds was confirmed by 1H NMR. In vivo studies using maximal electroshock (MES) and pentylenetetrazole (PTZ) models of epilepsy in mice revealed that while most of compounds had no effect on chemically-induced seizures at the higher dose
Tin powder-promoted one-pot synthesis of 3-spiro-fused or 3,3′-disubstituted 2-oxindoles
作者:Juanjuan Wang、Danfeng Huang、Ke-Hu Wang、Xiansha Peng、Yingpeng Su、Yulai Hu、Ying Fu
DOI:10.1039/c6ob01487a
日期:——
oxindoles has been developed from one-pot reactions of isatins, hydrazides or aromatic amines, 2-(bromomethyl)acrylic ester and tin powder in the presence of a catalytic amount of Brønsted or Lewis acid. The method avoids the use of toxic stannanes and allows easy operation. It is also proved that hydrazides are more favorable for intramolecular cyclization than amines.
Synthesis and antibacterial activity of Schiff bases of 5-substituted isatins
作者:Kamaleddin Haj Mohammad Ebrahim Tehrani、Maryam Hashemi、Maryam Hassan、Farzad Kobarfard、Shohreh Mohebbi
DOI:10.1016/j.cclet.2015.10.027
日期:2016.2
Abstract Based on the existing reports on the bioactive isatin derivatives, a number of Schiff bases were synthesized by reacting 5-substituted isatins with bioactive amines/hydrazides and their structures were confirmed using spectroscopic methods such as NMR, IR and massspectrometry. Furthermore, N -benzylation of isatin followed by the Schiff base formation furnished a new series of compounds (
Transformation of Isatin 3-Acylhydrazones under Acetylating Conditions: Synthesis and Structure Elucidation of 1,5′-Disubstituted 3′-Acetylspiro[oxindole-3,2′-[1,3,4]oxadiazolines]
作者:László Somogyi
DOI:10.1246/bcsj.74.873
日期:2001.5
Several substituted isatin 3-acylhydrazones (e.g. 1a–k, n, p, t) have been synthesized. Under acetylating conditions they were transformed into selectively acetylated derivatives (e.g., 1l, n, o, q–s) and into the novel, title spiroheterocycles (2a–i). Some side reactions occurring under various acetylating conditions are also discussed.
Action of Hydrazines on 2-(2-Oxindolin-3-ylidene)malononitrile, (<i>E</i>,<i>Z</i>)-Ethyl 2-cyano-2-(2-oxindolin-3-ylidene)acetate and Isatin-β-thiosemicarbazone as a Source of Spiro Indoline-pyrazole Systems
作者:Ahmed S. A. Youssef、Magdy M. Hemdan、Samir A. Emara、Rabaa M. Kamel
DOI:10.1002/jhet.2163
日期:2015.9
hydrazine hydrate itself and some of its simple congeners to give hydrazonederivatives bearing indoline‐2‐one moiety (2). The hydrazonederivatives (2) when heated with acetyl acetone or ethyl acetoacetate in dry pyridine afforded the spiro indoline derivatives (3a, 3b). Also, cinnoline derivative (9) is obtained by action of hydrazine hydrate on the N‐acetylderivative of (6a). The structures of the newly