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Journal Article
S. B. Kale, Jori, P. K., Thatikonda, T., Gonnade, R. G., and Das, U., “1,6-Conjugate-addition-induced [2+1] annulation of para-quinone methides and pyrazolones: synthesis of bis-spiro compounds with contiguous quaternary spiro-centers”, Organic Letters, vol. 21, no. 19, pp. 7736-7740, 2019.
P. Kumar, Kale, S. B., Gonnade, R. G., and Das, U., “Acid mediated sulfonylation of para-quinone methides with tosylmethyl isocyanides for the synthesis of diarylmethyl sulfones”, ChemistrySelect, vol. 6, no. 28, pp. 7158-7161, 2021.
T. Thatikonda, Deepake, S. K., Kumar, P., and Das, U., “Alpha-Angelica lactone catalyzed oxidation of benzylic sp(3) C-H bonds of isochromans and phthalans”, Organic & Biomolecular Chemistry, vol. 18, no. 21, pp. 4046-4050, 2020.
S. K. Deepake, Kumar, M., Kumar, P., and Das, U., “Alpha-angelica lactone catalyzed oxidation of pyrrolidines to lactams”, European Journal of Organic Chemistry, vol. 2022, no. 31, p. e202200712, 2022.
T. Thatikonda, Deepake, S. K., and Das, U., “Alpha-Angelica lactone in a new role: facile access to N-Aryl tetrahydroisoquinolinones and isoindolinones via organocatalytic alpha-CH2 oxygenation”, Organic Letters, vol. 21, no. 8, pp. 2532-2535, 2019.
S. K. Deepake, Lanjewar, A. B., Thatikonda, T., Gonnade, R. G., and Das, U., “Organocatalytic asymmetric cascade reaction of gamma-substituted deconjugated butenolides with o-formyl-beta-nitrostyrene”, ChemistrySelect, vol. 3, no. 28, pp. 8189-8192, 2018.
Y. - R. Chen, Das, U., Liu, M. - H., and Lin, W., “Organocatalytic enantioselective direct vinylogous michael addition of alpha,beta-unsaturated gamma-butyrolactam to beta-acyl acrylates and 1,2-diacylethylenes”, Journal of Organic Chemistry, vol. 80, no. 3, pp. 1985-1992, 2015.
P. Kumar, Rai, A., Kumar, M., Krishna, G. Rama, and Das, U., “Radical cascade cyclization of unactivated alkene-tethered indoles with aryldiazonium salt and sodium metabisulfite to access Azo- and Sulfonylated-2,3-Dihyro-1H-pyrrolo[1,2-a]indoles”, Journal of Organic Chemistry, vol. 88, no. 13, pp. 9123-9129, 2023.
S. B. Kale, Jori, P. K., and Das, U., “Rongalite as a sulfone source: sulfonylation of para-quinone methides and alkyl/allyl halides”, Chemistry-an Asian Journal, vol. 17, no. 16, p. e202200408, 2022.
S. B. Kale, Kumar, M., Shinde, D. R., Krishna, G. Rama, and Das, U., “Synthesis of N-functionalized 2,3-disubstituted benzofurans/naphthofurans from para-quinone methides and isocyanides via the [4+1] annulation pathway”, Organic Chemistry Frontiers, vol. 10, no. 15, pp. 3746-3751, 2023.
A. K. Mahida, Kale, S. B., and Das, U., “Synthesis route to pyrrolones from -cyano ,-unsaturated ketones and -isocyano esters by oxidative dearomatization of 2-aminofuran intermediates”, European Journal of Organic Chemistry, no. 43, pp. 6427-6433, 2017.