Ghosh, RajatVítor, Jorge M. B.Mendes, Maria EduardaPaulo, AlexandraAcharya, Pratap Chandra2023-08-142023-08-142020-10-16Ghosh R, Vitor JB, Mendes E, Paulo A, Acharya PC. Stereoselective synthesis of spirooxindole derivatives using one-pot multicomponent cycloaddition reaction and evaluation of their antiproliferative efficacy. ACS Omega [Internet]. 27 de outubro de 2020;5(42):27332–43. Disponível em: https://pubs.acs.org/doi/10.1021/acsomega.0c03675http://hdl.handle.net/10451/58873A highly stereoselective, one-pot, multicomponent method has been developed to synthesize pyrrolizidine- and N-methyl pyrrolidine-substituted spirooxindole derivatives. The [3 + 2] cycloaddition reaction involves the reaction between the dipole azomethine ylides, generated in situ from the reaction between isatin and secondary amino acids such as L-proline or sarcosine, and α,β-unsaturated carbonyl compounds as the dipolarophile. The reaction condition was optimized to achieve excellent regio- and stereoselectivity. Products were obtained in good yield using ethanol as a solvent at the reflux temperature. The newly synthesized spirooxindole derivatives were evaluated for their antiproliferative efficacy against National Cancer Institute (NCI)-60 cancer cell lines and DNA G-quadruplex (G4) interaction capacity. Compound 14b produced selective cytotoxicity against leukemia, renal, colon, and prostate cancer cell lines at a 10 μM concentration. The G4 interaction studies further suggested that these spirooxindole derivatives were devoid of any activity as DNA G4 ligands.engjournal article2022-10-19cv-prod-205420510.1021/acsomega.0c03675