Zobrazeno 1 - 10 of 15 pro vyhledávání: '"D. S. Larsen"'
1
Regio- and stereo-selective bromo(alkoxylation)s of (E )-α-(2,3,4,6-tetra-O-acetyl-β-D-glucopyranosyloxymethylene) carbonyl compounds. A route to near-stereopure α-bromo α-dioxymethyl carbonyl compounds †
Autor: P. D. Tiffin, Anthony Schofield, M. Sum Idris, Richard J. Stoodley, Robin G. Pritchard, D. S. Larsen
Publikováno v: Journal of the Chemical Society, Perkin Transactions 1. :2195-2204
(E)-4-Methoxymethoxy-3-methylbut-3-en-2-one 17b reacts with NBS in propan-1-ol in a highly regio- and anti-stereo-selective manner to give (3R*,4R*)-3-bromo-4-methoxymethoxy-3-methyl-4-propoxybutan-2-one 18. Compound 10, a relative of the butenone 17
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::79be62d1f61ad23fb3a96feb156267da
https://doi.org/10.1039/b002749i
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2
Unusual allylic acetoxylations of silyl enol ethers with lead(IV) acetate
Autor: Martine M. L. Crilley, Richard J. Stoodley, Fernando Tomé, D. S. Larsen
Publikováno v: Tetrahedron Letters. 34:3305-3308
1-Siloxycyclohexenes, bearing an oxy group at position 3 and a syn -disposed cis -fused ring at positions 4 and 5, undergo regio- and stereo-selective acetoxylations (at position 6) in the presence of lead(IV) acetate.
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::5bbf167943875328b454ef026f713a34
https://doi.org/10.1016/s0040-4039(00)73689-6
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4
ChemInform Abstract: Unusual Allylic Acetoxylations of Silyl Enol Ethers with Lead(IV) Acetate
Autor: Fernando Tomé, D. S. Larsen, Martine M. L. Crilley, Richard J. Stoodley
Publikováno v: ChemInform. 24
1-Siloxycyclohexenes, bearing an oxy group at position 3 and a syn -disposed cis -fused ring at positions 4 and 5, undergo regio- and stereo-selective acetoxylations (at position 6) in the presence of lead(IV) acetate.
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::b44a4a00e84feeb1d844fa485b4f86d9
https://doi.org/10.1002/chin.199341130
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5
An enantioselective synthesis of (+)-bostrycin leading to a revision of the absolute configuration of its natural antipode
Autor: Richard J. Stoodley, D. S. Larsen
Publikováno v: Tetrahedron. 46:4711-4732
An asymmetric Diels-Alder reaction, involving the protected naphthopurpurin (4) and the D-glucose-derived diene (9a), is used to assemble compound (22), which is transformed by way of compounds (26), (27) and (28) into (+)-bostrycin (3). An X-ray ana
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::815aa1706431c8a18567cd4626d7b05e
https://doi.org/10.1016/s0040-4020(01)85591-5
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6
Oligosaccharides related to xyloglucan: synthesis and X-ray crystal structure of methyl alpha-L-fucopyranosyl-(1--2)-beta-D-galactopyranosyl-(1--2)-alpha-D-x ylopyranoside and the synthesis of methyl alpha-L-fucopyranosyl-(1--2)-beta-D-galactopyranosyl-(1--2)-beta-D-xy lopyranoside
Autor: D K, Watt, D J, Brasch, D S, Larsen, L D, Melton, J, Simpson
Publikováno v: Carbohydrate research. 325(4)
Trisaccharides, methyl alpha-L-fucopyranosyl-(1--2)-beta-D-galactopyranosyl-(1--2)-alpha-D-xy lopyranoside and methyl alpha-L-fucopyranosyl-(1--2)-beta-D-galactopyranosyl-(1--2)-beta-D-xyl opyranoside, which are related to the side chain of xylogluca
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=pmid________::9eac318c643573ee3a79038b892f2500
https://pubmed.ncbi.nlm.nih.gov/10839123
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7
Oligosaccharides related to xyloglucan: synthesis and X-ray crystal structure of methyl 2-0-(alpha-L-fucopyranosyl)-beta-D-galactopyranoside
Autor: D K, Watt, D J, Brasch, D S, Larsen, L D, Melton, J, Simpson
Publikováno v: Carbohydrate research. 285
The disaccharides methyl 2-O-(alpha-L-fucopyranosyl)-beta-D-galactopyranoside and methyl 2-O-(alpha-L-fucopyranosyl)-alpha-D-galactopyranoside have been synthesised using the assisted halide reaction of tri-O-benzyl-alpha-L-fucopyranosyl bromide with
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=pmid________::f97194da55d7652c4dfd1f60d836813a
https://pubmed.ncbi.nlm.nih.gov/9011372
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8
ChemInform Abstract: An Enantioselective Synthesis of (+)-Bostrycin Leading to a Revision of the Absolute Configuration of Its Natural Antipode
Autor: Richard J. Stoodley, D. S. Larsen
Publikováno v: ChemInform. 21
An asymmetric Diels-Alder reaction, involving the protected naphthopurpurin (4) and the D-glucose-derived diene (9a), is used to assemble compound (22), which is transformed by way of compounds (26), (27) and (28) into (+)-bostrycin (3). An X-ray ana
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::aeebae8ca9c69f62d54c4e941884cc9f
https://doi.org/10.1002/chin.199044306
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10
Calculated energies and geometries for hydrogen impurities in Al and Mg
Autor: D S Larsen, J K Norskov
Publikováno v: Journal of Physics F: Metal Physics. 9:1975-1982
Self-consistent jellium calculations of the electron structure of hydrogen in Al and Mg have been supplemented with a first-order calculation of the energy contribution of the pseudopotential lattice. It is found that the most stable interstitial pos
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::95e3bc7f312bf6b1b5b17aee1091ea81
https://doi.org/10.1088/0305-4608/9/10/008
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