Synthetic Communications p. 563 - 577 (2003)
Update date:2022-08-04
Topics:
Jain, Subhash C.
Sinha, Juhi
Bhagat, Sunita
Errington
Olsen, Carl E.
A reaction of appropriate indol-2,3-diones with 4-aminoantipyrine has resulted in the formation of hitherto unknown 3-(2,3-dimethyl-5-oxol-phenyl-3-pyrazolin-4-yl-imino)-indol-2- ones in quantitative yields which upon cyclocondensation with mercaptoacetic acid afforded a series of new spiro heterocycles 3'-(2,3-dimethyl-5-oxo-1-phenyl-3-pyrazolin-4-yl) spiro[3H-indol-3,2'-thiazolidine]-2,4'-diones.
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