Versatile three component procedure for combinatorial synthesis of biologically relevant scaffold spiro[indole-thiazolidinones] under aqueous conditions
作者:Anshu Dandia、Ruby Singh、Sumit Bhaskaran、Shriniwas D. Samant
DOI:10.1039/c0gc00863j
日期:——
quantitative synthesis of medicinally important spiro[indole-thiazolidinone] libraries by the tandem reaction of readily available reagents using cetyltrimethylammonium bromide as a phase transfer catalyst. The present method is more convenient and efficient as compared to multistep conventional processes and it obviates the azeotropical removal of water and use of carcinogenic solvents and dehydrating agents
IMPROVED ONE-POT SYNTHESIS OF 3-SPIRO INDOLINES UNDER MICROWAVE IRRADIATION
作者:Anshu Dandia、Mitali Saha、Harshita Taneja
DOI:10.1080/10426509808035679
日期:1998.8.1
The potential of the domestic microwave oven has been utilized to accelerate the one-pot synthesis of spiro[indole-thiazolidine]diones and spiro[indole-benzothiazine]diones by condensation of substituted indole-2,3-diones (1) and appropriate anilines (2) with mercaptopropionic acid (4a/b) and o-mercaptobenzoic acid (5) in open borosilicate vessels, using ethanol as energy transfer medium. The reaction rate was 400-500 times faster than the reaction rate in the conventional way. Excellent isolated yields with easier workup than classical heating were the main advantages observed.
RAJOPADHYE, M.;POPP, F. D., J. HETEROCYCL. CHEM., 1984, 21, N 2, 289-291