SYNTHESIS OF SOME NEW SPIROPYRANS CONTAINING INDOLINE MOIETY
作者:Maher F. El-Zohry、Yasser A. Elossaily、Thanaa A. Mohamed、Essam M. Hussein
DOI:10.1515/hc.2008.14.3.195
日期:2008.1
Spiroheterocycles were used as nitric oxide synthesis inhibitors." Photochromism of indolinospirochromens containing condensed 19 fragments in the indoline part of the molecule were achieved. As continuation to our interest in this area" encouraged us to suggest the synthesis of some new spiroheterocycles of pyrans containing indoline moiety. Experimental The time required for completion of each reaction was monitored
Carbodiimide mediated synthesis of 4-thiazolidinones by one-pot three-component condensation
作者:Tumul Srivastava、W Haq、S.B Katti
DOI:10.1016/s0040-4020(02)00866-9
日期:2002.9
In the present study, 4-thiazolidinones have been assembled by DCC mediatedthree-component reaction of amine, aldehyde and mercaptoacetic acid. The final compounds are obtained in quantitative yields within one hour.
ONE-FLASK SYNTHESES OF SOME NEW SPIROTHIAZOLOPYRANOPYRAZOLE, SPIROTHIAZOLODIHYDROPYRIDI-NOPYRAZOLE AND SPIROTHIAZOLOTHIOPY-RANOPYRAZOLE DERIVATIVES AS ANTIMICROBIAL AGENTS
作者:Abdullah A. Al-ahmadi
DOI:10.1080/10426509708043500
日期:1997.3.1
(1a-f) in a mixture of ethanol/pyridine at reflux temperature to give spirothiazolopyranopyrazoles (3a-l) in one flask. The fusion of compounds 1a-f with 2a and/or 2b in the presence of ammonium acetate afforded spirothiazolodihydropyridinopyrazole derivatives (4a-l) in good yields. Also the reaction of compounds 1a-f with 2a and/or 2b with phosphoruspentasulfide in pyridine at reflux temperature yielded
Mesoporous MCM-41-supported Schiff base and CuSO4·5H2O (MCM-41@Schiff base-CuSO4·5H2O) catalyzed one-pot three-component condensation of cyclic ketones, amines and thioglycolicacid in toluene. And a series of corresponding spiro thiazolidinone derivatives were obtained in high yields (up to 97%). The synthesized catalyst was characterized via FT-IR, XRD, SEM, TEM and EDS and can be easily recovered