10 article(s) from Misra, Anup Kumar
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- Published 15 Jul 2020
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Figure 1: Structure of the synthesized tetrasaccharide and its synthetic intermediates.
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Scheme 1: Stepwise stereoselective synthesis of tetrasaccharide 1. Reagents and conditions: (a) NIS, HClO4-SiO...
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Scheme 2: Iterative stereoselective three-step one-pot glycosylation. Reaction conditions: (a) NIS, HClO4-SiO2...
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- Full Research Paper
- Published 22 Jan 2020
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Figure 1: Structure of the pentasaccharide repeating unit corresponding to the cell wall O-antigen of Escheri...
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Scheme 1: (a) NIS, HClO4/SiO2, MS 4 Å, CH2Cl2, −45 °C, 1 h, 79%; (b) 0.1 M CH3ONa, CH3OH, room temperature, 2...
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Scheme 2: (a) HClO4/SiO2, CH2Cl2, −10 °C, 1 h, 76%.
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Scheme 3: (a) NIS, HClO4/SiO2, MS 4 Å, CH2Cl2, −40 °C, 1 h, 22%.
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Scheme 4: (a) NIS, HClO4/SiO2, MS 4 Å, CH2Cl2, −45 °C, 1 h, 74%; (b) BnBr, NaOH, TBAB, THF, room temperature,...
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- Published 13 Feb 2019
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Figure 1: Structure of the synthesized pentasaccharide corresponding to the repeating unit of the biofilms pr...
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Scheme 1: Reagents and conditions: (a) i: Bu2SnO, CH3OH, 80 °C, 2 h; ii: allyl bromide, CsF, DMF, 65 °C, 6 h;...
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Scheme 2: Reagents and conditions: (a) Benzoyl chloride, pyridine, 0 °C, 3 h, 75%; (b) Tf2O, BSP, TTBP, CH2Cl2...
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Scheme 3: Reagents and conditions: (a) TMSOTf, CH2Cl2, −10 °C, 30 min, 45%; (b) NIS, TMSOTf, MS 4 Å, CH2Cl2, ...
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Scheme 4: Reagents and conditions: (a) NIS, TMSOTf, MS 4 Å, CH2Cl2, −50 °C, 2 h, 70%; (b) benzyl bromide, NaO...
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- Published 29 Jan 2014
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Figure 1: Structure of the synthesized tetrasaccharide and its precursor intermediates. PMB: p-methoxybenzyl.
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Scheme 1: Reagents and conditions: (a) 2,2-dimethoxypropane, p-TsOH, DMF, room temperature, 12 h; (b) acetic ...
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Scheme 2: Reagents: (a) N-iodosuccinimide (NIS), TfOH, CH2Cl2, MS 4 Å, −30 °C, 1 h, then 0 °C, 1 h, 77%; (b) ...
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- Full Research Paper
- Published 28 Aug 2013
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Figure 1: Structure of the tetrasaccharide repeating unit of the O-antigen of Escherichia coli O16.
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Figure 2: Structure of the synthesized pentasaccharide and its synthetic intermediates.
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Scheme 1: Reagents: (a) N-iodosuccinimide (NIS), TfOH, CH2Cl2, MS 4 Å, −30 °C, 1 h, then 0 °C, 1 h, 76%; (b) ...
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- Full Research Paper
- Published 22 May 2013
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Scheme 1: Appel-reagent-mediated transformation of glycosyl hemiacetal derivatives into thioglycosides and β-...
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Scheme 2: Plausible mechanistic pathways for the formation of 1,2-trans-thioglycoside and β-glycosyl thiol.
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- Letter
- Published 11 Apr 2013
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Figure 1: Structure of the synthesized trisaccharide core found in kankanose, kankanoside F, H1, H2 and I iso...
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Scheme 1: Reagents: (a) 0.1 M CH3ONa, CH3OH, room temperature, 3 h, 98% for compound 5, 94% for compound 1; (...
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- Published 14 Jan 2013
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Scheme 1: Removal of benzylidene acetal and benzyl ether by using a combination of triethylsilane and 10% Pd/...
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- Published 22 Nov 2012
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Figure 1: Structure of the tetrasaccharide repeating unit of the cell-wall lipopolysaccharide of Escherichia ...
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Figure 2: Structure of the synthesized tetrasaccharide 1 and its synthetic precursors.
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Scheme 1: Synthesis of disaccharide derivative 8. Reagents and conditions: (a) benzyl bromide, NaOH, DMF, roo...
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Scheme 2: Synthesis of disaccharide derivative 9. Reagents and conditions: (a) NIS, HClO4–SiO2, MS 4Å, CH2Cl2...
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Scheme 3: Synthesis of target tetrasaccharide 1. Reagents and conditions: (a) NIS, HClO4–SiO2, CH2Cl2, −15 °C...
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- Full Research Paper
- Published 29 Aug 2011
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Figure 1: Structure of the tetrasaccharide repeating unit of the O-antigen of Shigella boydii type 9.
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Figure 2: Structure of the synthesized tetrasaccharide and its intermediates.
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Scheme 1: Reagents: (a) acetic anhydride, sulfamic acid, 60 °C, 30 min, 91%; (b) Et3SiH, I2, 0–5 °C, 30 min, ...
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Scheme 2: Reagents: (a) HClO4–SiO2, CH2Cl2, −15 °C, 1 h, 81%; (b) benzyl bromide, NaOH, n-Bu4NBr, THF, rt, 2 ...
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Scheme 3: Reagents: (a) N-iodosuccinimide, HClO4–SiO2, −10 °C, 1 h, 82%; (b) 0.1 M CH3ONa, CH3OH, rt, 3 h; (c...
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