Search Results - "Wee, Andrew G. H"

Stereoselective Syntheses of (+)-2-epi-Deoxoprosopinine, (−)-Deoxoprosophylline, (+)-cis-195A, and 2,5-Di-epi-cis-195A from a Common Chiral Nonracemic Building Block by Annadi, Krishna, Wee, Andrew G. H

“…Approaches toward the syntheses of alkaloids belonging to the 2,6-disubstituted 3-hydroxypiperidine and cis-decahydroquinoline (cis-DHQ) classes of alkaloids…”
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Nonracemic Bicyclic Lactam Lactones via Regio- and cis-Diastereocontrolled C−H Insertion. Asymmetric Synthesis of (8S,8aS)-Octahydroindolizidin-8-ol and (1S,8aS)-Octahydroindolizidin-1-ol by Wee, Andrew G. H, Fan, Gao-Jun, Bayirinoba, Hypolite M

“…The Rh2(MPPIM)4-catalyzed intramolecular C−H insertion reaction of (S)- and (R)-1-benzyl-5-(α-diazoacetoxy)piperidin-2-one and…”
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An Alkylidene Carbene C–H Activation Approach toward the Enantioselective Syntheses of Spirolactams: Application to the Synthesis of (−)-Adalinine by Annadi, Krishna, Wee, Andrew G. H

“…A method based on in situ alkylidene carbene generation-C–H insertion reaction of 5-(3-oxobutyl)­pyrrolidin-2-ones and 6-(3-oxobutyl)­piperidin-2-ones is…”
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NMR Studies of Amine Species in MEA−CO2−H2O System: Modification of the Model of Vapor−Liquid Equilibrium (VLE) by Fan, Gao-jun, Wee, Andrew G. H, Idem, Raphael, Tontiwachwuthikul, Paitoon

“…Speciation studies in aqueous monoethanolamine (MEA) solution at different CO2 loadings have been conducted via nuclear magnetic resonance (NMR) spectroscopy…”
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Mapping the Mechanism of the Resorcinol Ring Formation Catalyzed by ArsB, a Type III Polyketide Synthase from Azotobacter vinelandii by Posehn, Sarah E., Kim, Sun Young, Wee, Andrew G. H., Suh, Dae-Yeon

“…Who's first? Aldol cyclization occurs before hydrolysis in the resorcinol ring formation catalyzed by the type III polyketide synthase, ArsB. Synthetic C20‐TKA…”
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Di- and Trisubstituted γ-Lactams via Rh(II)-carbenoid Reaction of N-Cα-Branched, N-Bis(trimethylsilyl)methyl α-Diazoamides. Synthesis of (±)-α-Allokainic Acid by Zhang, Bao, Wee, Andrew G. H

“…Acyclic N-Cα-branched, N-bis(trimethylsilyl)methyl (N-BTMSM) diazoamides undergo regio-, chemo-, and diastereoselective Rh(II)-carbenoid C−H insertion to give…”
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PpASCL, a moss ortholog of anther-specific chalcone synthase-like enzymes, is a hydroxyalkylpyrone synthase involved in an evolutionarily conserved sporopollenin biosynthesis pathway by Colpitts, Che C., Kim, Sung Soo, Posehn, Sarah E., Jepson, Christina, Kim, Sun Young, Wiedemann, Gertrud, Reski, Ralf, Wee, Andrew G. H., Douglas, Carl J., Suh, Dae-Yeon

“…Sporopollenin is the main constituent of the exine layer of spore and pollen walls. Recently, several Arabidopsis genes, including polyketide synthase A…”
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Asymmetric Synthesis of (+)-Isofebrifugine and (−)-Sedacryptine from a Common Chiral Nonracemic Building Block by Wee, Andrew G. H, Fan, Gao-Jun

“…The stereoselective syntheses of 2-substituted and 2,6-disubstituted 3-hydroxypiperidine alkaloids, (+)-isofebrifugine and (−)-sedacryptine, from a common,…”
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The Bis(trimethylsilyl)methyl Group as an Effective N-Protecting Group and Site-Selective Control Element in Rhodium(II)-Catalyzed Reaction of Diazoamides by Wee, Andrew G. H, Duncan, Sammy C

“…The intramolecular rhodium(II)−carbenoid-mediated C−H insertion reaction of structurally varied N-bis(trimethylsilyl)methyl,N-substituted diazoamides is…”
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Stereoselective Synthesis of the Nonproteinogenic Amino Acid (2S,3R)-3-Amino-2-hydroxydecanoic Acid from (4S,5S)-4-Formyl-5-vinyl-2-oxazolidinone by Wee, Andrew G. H, McLeod, Douglas D

“…(4S,5S)-4-Formyl-5-vinyl-2-oxazolidinone (4b), which is readily obtained via a zinc−silver-mediated reductive elimination of α-d-lyxofuranosyl phenyl sulfone…”
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Influences of Catalyst Configuration and Catalyst Loading on Selectivities in Reactions of Diazoacetamides. Barrier to Equilibrium between Diastereomeric Conformations by Doyle, Michael P, Hu, Wenhao, Wee, Andrew G. H, Wang, Zhongyi, Duncan, Sammy C

“…Stereoelectronic factors present a barrier to equilibrium between diastereomeric conformations resulting in differences in selectivity as a function of…”
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Conformational, steric and electronic effects on the site- and chemoselectivity of the metal-catalyzed reaction of N-bis(trimethylsilyl)methyl, N-(2-indolyl)methyl α-diazoamides by Zhang, Bao, Wee, Andrew G H

“…The Rh(II)- and Cu(II)-catalyzed reactions of N-bis(trimethylsilyl)methyl, N-(2-indolyl)methyl α-diazoamides are investigated to delineate how conformational,…”
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Comparative Mass Transfer Performance Studies of CO2 Absorption into Aqueous Solutions of DEAB and MEA by Maneeintr, Kreangkrai, Idem, Raphael O, Tontiwachwuthikul, Paitoon, Wee, Andrew G. H

“…The mass transfer performance of the absorption of CO2 in an aqueous solution of a new amino alcohol, 4-diethylamino-2-butanol (DEAB), which has been developed…”
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Di- and Trisubstituted γ-Lactams via Rh(II)-carbenoid Reaction of N-Cα-Branched, N-Bis(trimethylsilyl)methyl α-Diazoamides. Synthesis of (±)-α-Allokainic Acid by Zhang, Bao, Wee, Andrew G. H

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Metal-catalyzed reaction of N-(2-indolyl)methyl, N-bis(trimethylsilyl)methyl diazoamides: an entry into the beta-carboline ring system by Zhang, Bao, Wee, Andrew G H

“…The intramolecular metal-catalyzed reaction of N-(2-indolyl)methyl, N-bis(TMS)methyl diazoamides proceeds with high conformational control and chemoselectivity…”
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Ceric ammonium nitrate oxidation of N-(p-methoxybenzyl)lactams: competing formation of N-(hydroxymethyl)δ-lactams by Annadi, Krishna, Wee, Andrew G. H.

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Competing Isomerizations:  A Combined Experimental/Theoretical Study of Phenylpentenone Isomerism by Wang, Zhongyi, Wee, Andrew G. H, Hepperle, Steven S, Treble, Ron G, East, Allan L. L

“…The possible competition of Z/E versus hydrogen-shift isomerization in (E)-5-phenyl-3-penten-2-one (E -1) and (E)-5-phenyl-4-penten-2-one (E-2) was studied,…”
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A Dirhodium(II)−Carbenoid Route to (−)- and (+)-Geissman−Waiss Lactone:  Synthesis of (1R,7R,8R)-(−)-Turneforcidine by Wee, Andrew G. H

“…(−)- and (+)-Geissman−Waiss lactone, 4b, was efficiently prepared via the intramolecular C−H insertion reaction of the chiral nonracemic diazoacetates (−)-5a…”
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Porphyrin- and porphyrinoid-based covalent organic frameworks (COFs): From design, synthesis to applications by Chen, Minghui, Li, Hongrui, Liu, Chenxi, Liu, Jiayi, Feng, Yaqing, Wee, Andrew G.H., Zhang, Bao

“…•Porphyrin and porphyrinoid-based covalent organic frameworks (COFs) are reviewed.•The design and synthesis of porphyrin and porphyrinoid-based COFs are…”
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Physical and transport properties of aqueous amino alcohol solutions for CO2 capture from flue gas streams by Maneeintr, Kreangkrai, Henni, Amr, Idem, Raphael O., Tontiwachwuthikul, Paitoon, Wee, Andrew G.H.

“…Densities, viscosities and refractive indices of 4-diethylamino-2-butanol + water mixtures were measured over the entire concentration range of 0-1 mole…”
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