REGIO- AND STEREOSELECTIVE 1,3-DIPOLAR CYCLOADDITION OF AZOMETHINE YLIDES BASED ON ISATINS AND (THIA)PROLINE TO 3-NITRO-2-(TRIFLUORO(TRICHLORO)METHYL)-2<i>H</i>-CHROMENES: SYNTHESIS AND CYTOTOXIC ACTIVITY OF 6'-(TRIHALOMETHYL)SPIRO[CHROMENO(THIA)PYRROLIZIDINE-11,3'-INDOLIN]-2'-ONES
DOI:
https://doi.org/10.1007/6321Keywords:
azomethine ylide, isatins, 3-nitro-2-(trihalomethyl)-2H-chromene, L-proline, spiro[chromeno(thia)oxindole-pyrrolizidines], L-thiaproline, cytotoxic activity, 1, 3-dipolar cycloadditionAbstract
A regio- and stereoselective method for the synthesis of (trifluoro(trichloro)methyl)-substituted spiro[chromeno(thia)oxindole-pyrrolizidines] in 53–97% yields was developed on the basis of the three-component reaction of 3-nitro-2-(trifluoro(trichloro)methyl)-2H-chromenes with azomethine ylides generated in situ from isatins and L-(thia)proline in EtOH at 30°C. The obtained compounds demonstrated high cytotoxic activity against HeLa human cervical cancer and RD human embryonic rhabdomyosarcoma cells.
Authors: Igor B. Kutyashev, Maria V. Ulitko, Alexey Yu. Barkov, Nikolay S. Zimnitskiy, Vladislav Yu. Korotaev*, Vyacheslav Ya. Sosnovskikh