OKRAM MUKHERJEE SINGH
Articles written in Journal of Chemical Sciences
Volume 125 Issue 5 September 2013 pp 1103-1107
Okram Mukherjee Singh Laishram Ronibala Devi Neeladri Das
Polyaza 𝛼-oxoketene 𝑆,𝑁-acetals can exist as either enamino or imino tautomeric forms. Based on the spectroscopic data and structural analysis of one of the 𝑆,𝑁-acetals, the stereochemistry was unambiguously assigned as an
Volume 128 Issue 4 0000 pp 562-572 Regular Articles
One pot synthesis of 1-substituted tetrahydro-Β-carbolines by Bischler–Napieralski cyclization
THOKCHOM PRASANTA SINGH OKRAM MUKHERJEE SINGH
A novel and facile one-pot synthesis of 1-substituted tetrahydro-Β-carbolines by cyclocondensationof ketene S,S–acetals with tryptamine in presence of In $Cl_{3}$ and TFA as co-catalysts by Bischler-Napieralskicyclization is described. The reaction involves formation of one C-N bond, one C-C bond and a new ringannulation over an indole moiety.
Volume 128 Issue 4 0000 pp 565-572 Regular Articles
One pot synthesis of 1-substituted tetrahydro-Β-carbolines by Bischler–Napieralski cyclization
THOKCHOM PRASANTA SINGH OKRAM MUKHERJEE SINGH
A novel and facile one-pot synthesis of 1-substituted tetrahydro-Β-carbolines by cyclocondensationof ketene S,S–acetals with tryptamine in presence of In $Cl_{3}$ and TFA as co-catalysts by Bischler-Napieralskicyclization is described. The reaction involves formation of one C-N bond, one C-C bond and a new ringannulation over an indole moiety.
Volume 132 All articles Published: 22 January 2020 Article ID 0028
The one-pot four-component eco-friendly synthesis of spirooxindoles in deep eutectic solvent
THOKCHOM JEETA DEVI THOKCHOM PRASANTA SINGH OKRAM MUKHERJEE SINGH
An efficient and facile synthesis of spirooxindole derivatives bearing pyrano[2,3-c]pyrazole moiety has been achieved using deep eutectic solvent (DES) promoting a four-component reaction. The protocol avoids the use of costly and toxic catalysts and organic solvents which encounters many side effects on the environment and human beings. The simplicity and versatility of this eco-friendly green method isdescribed.
Volume 132, 2020
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