Search Results - "CRICH, D"

1-Benzenesulfinyl Piperidine/Trifluoromethanesulfonic Anhydride:  A Potent Combination of Shelf-Stable Reagents for the Low-Temperature Conversion of Thioglycosides to Glycosyl Triflates and for the Formation of Diverse Glycosidic Linkages by Crich, David, Smith, Mark

“…The combination of 1-benzenesulfinyl piperidine (BSP) and trifluoromethanesulfonic anhydride (Tf2O) forms a new, powerful, metal-free thiophile that can…”
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Why Are the Hydroxy Groups of Partially Protected N-Acetylglucosamine Derivatives Such Poor Glycosyl Acceptors, and What Can Be Done about It? A Comparative Study of the Reactivity of N-Acetyl-, N-Phthalimido-, and 2-Azido-2-deoxy-glucosamine Derivatives in Glycosylation. 2-Picolinyl Ethers as Reactivity-Enhancing Replacements for Benzyl Ethers by Crich, David, Dudkin, Vadim

“…Competition experiments were used to determine that the 4-OH of a 2-deoxy-2-azidoglucose derivative is more reactive than that of the corresponding…”
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Fluorous Swern Reaction by Crich, David, Neelamkavil, Santhosh

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Dynamics of Alkene Radical Cation/Phosphate Anion Pair Formation from Nucleotide C4‘ Radicals. The DNA/RNA Paradox Revisited by Crich, David, Huang, Wenhua

“…The fragmentation of nucleotide C4‘ radicals generated by thiyl radical addition to C4‘C5‘ exocyclic glycals has been re-examined and found to be a function of…”
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Branched Aliphatic Alkanes with Quaternary Substituted Carbon Atoms in Modern and Ancient Geologic Samples by Kenig, Fabien, Simons, Dirk-Jan H., Crich, David, Cowen, James P., Ventura, Gregory T., Rehbein-Khalily, Tatiana, Brown, Todd C., Anderson, Ken B.

“…A pseudohomologous series of branched aliphatic alkanes with a quaternary substituted carbon atom (BAQCs, specifically 2,2-dimethylalkanes and 3,3- and…”
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Product Studies and Laser Flash Photolysis on Alkyl Radicals Containing Two Different β-Leaving Groups Are Consonant with the Formation of an Olefin Cation Radical by Bales, Brian C, Horner, John H, Huang, Xianhai, Newcomb, Martin, Crich, David, Greenberg, Marc M

“…1-Bromo-2-methoxy-1-phenylpropan-2-yl (3) and 2-methoxy-1-phenyl-1-diphenylphosphatopropan-2-yl (4) were generated under continual photolysis from the…”
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Direct Measurement of Enol Ether Radical Cation Reaction Kinetics by Newcomb, Martin, Miranda, Neil, Sannigrahi, Mousumi, Huang, Xianhia, Crich, David

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Nucleotide C3‘,4‘-Radical Cations and the Effect of a 2‘-Oxygen Substituent. The DNA/RNA Paradox by Crich, David, Mo, Xue-Sheng

“…The chemistry of carbon-centered free radicals is only perturbed to a minor extent by the presence of beta -hydroxy and beta -alkoxy groups. The beta…”
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Chiral acyl radical equivalents: 5- exo cyclization of conformationally constrained 1,3-dioxolanyl radicals by Stien, D., Crich, D., Bertrand, M.P.

“…Chiral 1,3-dioxolan-2-yl radicals derived from acetals 8 and 9 underwent intramolecular hydrogen abstraction followed by 5-exo-trig cyclization on treatment…”
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Improved methods for the stereoselective synthesis of mannoheptosyl donors and their glycosides: toward the synthesis of the trisaccharide repeating unit of the Campylobacter jejuni RM1221 capsular polysaccharide by Picard, Sébastien, Crich, David

“…In view of the importance of 6-deoxymannoheptosides as structural units in the Campylobacter jejuni RM1221 capsular polysaccharide, the development of…”
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Chemistry of Acyl Radicals by Chatgilialoglu, Chryssostomos, Crich, David, Komatsu, Mitsuo, Ryu, Ilhyong

“…Chatgilialoglu et al discuss recent developments in the field of acyl radical chemistry. Until recently, the application of acyl radicals in fine organic…”
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Stereoselective Synthesis of α-Keto-deoxy-D-glycero-D-galacto-nonulosonic Acid Glycosides by Means of the 4,5-O-Carbonate Protecting Group by Crich, David, Navuluri, Chandrasekhar

“…Unrivaled: A 1‐adamantyl thioglycoside derivative of the nonulosonic acid KDN, carrying a 4,5‐O‐carbonate protecting group, is a highly efficient and…”
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Designed Chiral Acyl Radical Equivalents. Preparation and Cyclizations of Disymmetrically Substituted 1,3-Dioxabicyclo[4.4.0]decan-2-yl Radicals by Stien, D, Samy, R, Nouguier, R, Crich, D, Bertrand, M. P

“…The diastereoselectivity of 5-exo-trigonal cyclizations of 2-(4-penten-1-yl)-1,3-dioxolan-2-yl and 2-(4-penten-1-yl)-1,3-dioxan-2-yl radicals is investigated…”
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Absence of Diffusively Free Radical Cation Intermediates in Reactions of β-(Phosphatoxy)alkyl Radicals by Choi, Seung-Yong, Crich, David, Horner, John H, Huang, Xianhai, Martinez, Felix N, Newcomb, Martin, Wink, Donald J, Yao, Qingwei

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Direct chemical synthesis of β-mannopyranosides and other glycosides via glycosyl triflates by Crich, David, Sun, Sanxing

“…High yield, highly stereoselective methods for the synthesis of β-mannopyranosides of primary, secondary, and tertiary alcohols are presented. Activation of…”
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CHEMISTRY OF GLYCOSYL TRIFLATES: SYNTHESIS OF β-MANNOPYRANOSIDES by Crich, David

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Direct Formation of β-Mannopyranosides and Other Hindered Glycosides from Thioglycosides by Crich, David, Sun, Sanxing

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Solid-Phase Synthesis of β-Mannosides by Crich, David, Smith, Mark

“…The linkage of S-phenyl 2,3-di-O-benzyl-α-d-thiomannopyranoside to a cross-linked polystyrene support in the form of its 4,6-O-polystyrylborinate ester is…”
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Synthesis Of Fully-Substituted Enediynes by the Corey-Winter Reaction by Crich, D., Pavlovic, A. B., Wink, D. J.

“…Functionalized alkynes are oxidized to the corresponding α-diketones with catalytic RuO 4 and NaIO 4 . Treatment of these diones with metal acetylenides then…”
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Influence of protecting groups on the reactivity and selectivity of glycosylation: chemistry of the 4,6-o-benzylidene protected mannopyranosyl donors and related species by Aubry, Sylvain, Sasaki, Kaname, Sharma, Indrajeet, Crich, David

“…The genesis and development of the 4,6-O-benzylidene acetal method for the preparation of β-mannopyranosides are reviewed. Particular emphasis is placed on the…”
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