U
Udayanath Aich
Researcher at Indian Institute of Technology Madras
Publications - 9
Citations - 131
Udayanath Aich is an academic researcher from Indian Institute of Technology Madras. The author has contributed to research in topics: Catalysis & Hydrogen bond. The author has an hindex of 8, co-authored 9 publications receiving 127 citations.
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Journal ArticleDOI
Observation of a unique pattern of bifurcated hydrogen bonds in the crystal structures of the N-glycoprotein linkage region models.
TL;DR: An analysis of C-H)...O interactions in the crystal structures of all N-glycoprotein linkage region models and analogs reveals a cooperative network of bifurcated hydrogen bonds consisting of N-H...O and C-h...O interactions seen uniquely for the models.
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Zeolite-catalyzed Helferich-type glycosylation of long-chain alcohols. Synthesis of acetylated alkyl 1,2-trans glycopyranosides and alkyl 1,2-cis C2-hydroxy-glycopyranosides.
TL;DR: The yield of synthetically valuable acetylated long-chain alkyl 1,2-cis C2-hydroxy-glycopyranosides obtained in the present single-step procedure is considerably higher than that of the previously reported multi-step method employing the Stork silicon tether approach.
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Conformational Preferences of the Aglycon Moiety in Models and Analogs of GlcNAc-Asn Linkage : Crystal Structures and ab Initio Quantum Chemical Calculations of N-(β-D-Glycopyranosyl)haloacetamides
Mohamed Mohamed Naseer Ali,Udayanath Aich,Babu Varghese,Serge Pérez,Anne Imberty,Duraikkannu Loganathan +5 more
TL;DR: The conjunction of crystallographic and computational chemistry studies provides arguments for the structural effect of the N-acetyl group at C2 in establishing an extended conformation that presents the oligosaccharide away from the protein surface.
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Stereoselective single-step synthesis and X-ray crystallographic investigation of acetylated aryl 1,2-trans glycopyranosides and aryl 1,2-cis C2-hydroxy-glycopyranosides.
TL;DR: X-ray crystallographic analysis of phenyl 3,4,6-tri-O-acetyl-alpha-D-glucopyranoside and p-fluorophenyl showed that the molecular packing is stabilized by C-H...O, C- H...pi and C-F interactions, in addition to regular hydrogen bonding patterns.
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Synthesis of N‐(β‐Glycopyrano‐syl)azidoacetamides
TL;DR: Balasubramanian et al. as mentioned in this paper synthesize mimetics of the widely distributed GlcNAc•Asn linkage in glycoproteins in four steps involving selective N•chloroacetylation, peracetylization catalyzed by Na β−zeolite, displacement of the Cl group by NaN3 in aqueous acetone, and Zemplen de−O•acetylations.