Ramkrishna Maity - Academia.edu (original) (raw)
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Papers by Ramkrishna Maity
European Journal of Organic Chemistry, 2018
An efficient strategy for the synthesis of all carbon quaternary centres has been developed via B... more An efficient strategy for the synthesis of all carbon quaternary centres has been developed via Brønsted acid promoted highly regioselective intermolecular Friedel-Crafts reactions of heteroarenes or arenes with spiro-epoxyoxindoles. In addition, we have successfully performed the ring opening reaction in relatively cheaper condition using water as a solvent. Beneficially, we have utilized the methodology as the key step for the synthesis of advanced precursors of various natural and unnatural indole alkaloids.
Organic & Biomolecular Chemistry, 2017
The combination of stereocontrolled Evanssyn-aldol, intramolecular ene and RCM reactions is shown... more The combination of stereocontrolled Evanssyn-aldol, intramolecular ene and RCM reactions is shown to be a general protocol for the synthesis of C8-deoxy- and -oxy guaianolides. Unified total synthesis of (+)-chinensiolide B and (+)-8-epigrosheimin is demonstrated from a common precursor.
European Journal of Organic Chemistry, 2018
An efficient strategy for the synthesis of all carbon quaternary centres has been developed via B... more An efficient strategy for the synthesis of all carbon quaternary centres has been developed via Brønsted acid promoted highly regioselective intermolecular Friedel-Crafts reactions of heteroarenes or arenes with spiro-epoxyoxindoles. In addition, we have successfully performed the ring opening reaction in relatively cheaper condition using water as a solvent. Beneficially, we have utilized the methodology as the key step for the synthesis of advanced precursors of various natural and unnatural indole alkaloids.
Organic & Biomolecular Chemistry, 2017
The combination of stereocontrolled Evanssyn-aldol, intramolecular ene and RCM reactions is shown... more The combination of stereocontrolled Evanssyn-aldol, intramolecular ene and RCM reactions is shown to be a general protocol for the synthesis of C8-deoxy- and -oxy guaianolides. Unified total synthesis of (+)-chinensiolide B and (+)-8-epigrosheimin is demonstrated from a common precursor.