4 article(s) from Kumar, Sandeep
- Letter
- Published 21 Feb 2022
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Scheme 1: Catalytic asymmetric nitroso aldol reaction.
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Scheme 2: Variation of the amide moiety of malonamates. General conditions: 1 (0.20 mmol), 2a (0.24 mmol), 3a...
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Figure 1: ORTEP diagram drawn with 30% ellipsoid probability for non-H atoms of the crystal structure of chir...
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Scheme 3: Variation of ester moiety of malonamates and nitrosoarenes. General conditions: 1 (0.20 mmol), 2a (...
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Scheme 4: Synthetic transformation.
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Figure 2: Proposed transition state for the nitroso aldol reaction.
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- Full Research Paper
- Published 11 Jan 2022
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Figure 1: Structure of AZT and representative related bicyclic nucleosides.
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Scheme 1: Retrosynthetic routes for the synthesis of (5′R)-3′-azido-3′-deoxy-2′-O,5′-C-bridged-β-ᴅ-homoarabin...
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Scheme 2: Synthesis of 3′-azido-3′-deoxy-β-ᴅ-allofuranosylthymine (14a) and -uracil (14b).
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Scheme 3: Biocatalytic acetylation of the primary hydroxy group of nucleosides 14a,b.
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Scheme 4: Synthesis of (5'R)-3′-azido-3′-deoxy-2′-O,5′-C-bridged-β-ᴅ-homoarabinofuranosyl nucleosides 9a,b.
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Scheme 5: Chemical synthesis of nucleosides 9a,b starting from diacetone ᴅ-glucofuranose.
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Figure 2: Structure elucidation of (5′R)-3′-azido-3′-deoxy-2′-O,5′-C-bridged-β-ᴅ-homoarabinofuranosylthymine (...
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Scheme 6: a) Plausible mechanism for the synthesis of (5′R)-3′-azido-3′-deoxy-2′-O,5′-C-bridged-β-ᴅ-homoarabi...
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- Full Research Paper
- Published 25 Apr 2013
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Scheme 1: Syntheses of 6-aryl-4-methylthio-2H-pyran-2-one-3-carbonitriles 3.
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Figure 1: ORTEP view with atom numbering scheme of compound 5 with displacement ellipsoids at the 30% probabi...
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Scheme 2: A plausible mechanism for the formation of 1-aryl-3-methylthio-5H-dibenzo[d,f][1,3]diazepin-6(7H)-o...
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Scheme 3: Synthesis of 3-alkenylindolin-2-ones.
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Figure 2: ORTEP view with atom numbering scheme of compound 8yc with displacement ellipsoids at the 30% proba...
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Scheme 4: Synthesis of 1-aryl-3-sec-amino-5H-dibenzo[d,f][1,3]diazepin-6(7H)-ones 10.
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Figure 3: Centrosymmetric dimer of 8yc bound by a pair of weak C−H…π intermolecular interactions (symm. op. 2...
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Figure 4: Supramolecular chain of 8yc bound by weak C−H…O intermolecular interactions (symm. op. x,1 + y, z).
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Figure 5: Supramolecular chain of 8yc bound by weak C−H…O and Ar-H…π intermolecular interactions (symm. op. 2...
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