Diastereoselective hydrogenations of α-alkyl α-(2,3,4,6-tetra-O-acetyl-β-<scp>D</scp>-glucopyranosyloxy)methylene carbonyl compounds. New route to stereopure α-alkyl α-oxymethyl carbonyl compounds
作者:David S. Larsen、Anthony Schofield、Richard J. Stoodley、Peter D. Tiffin
DOI:10.1039/p19960002487
日期:——
Wittigcondensation of the stabilisedphosphoranes 9, 10 and 26 with 1-formyl-2,3,4,6-tetra-O-acetyl-β-D-glucopyranose 11 leads to the vinylogous carbonates 12, 13 and 22. The salts 27–30 and 44, prepared from the corresponding carbonyl compounds, ethyl formate and sodium methoxide, react with acetobromoglucose 21 to give compounds 22–25 and 43.
Isolation and synthesis of β-miroside an antifungal furanone glucoside from Prumnopitys ferruginea
作者:Stephen D. Lorimer、Simon D. Mawson、Nigel B. Perry、Rex T. Weavers
DOI:10.1016/0040-4020(95)00352-9
日期:1995.6
The bioactivity-directed isolation and structural determination of β-miroside 3-[(β-D-glucopyranosyloxy)-methyl]-2(5H)-furanone} from the New Zealand gymnosperm Prumnopitysferruginea, is described. Picein 4-(β-D-glucopyranosyloxy)acetophenone} was also isolated. Syntheses of β-miroside, its α-anomer and an isomer with an exocyclic double bond, are described, along with an unusual reaction of an
Diastereoselective hydrogenations of α-(2′,3′,4′,6′-tetra-O-acetyl-β-d-glucopyranosyloxymethylene) carboxylic esters: A route to stereopure aldol derivatives
作者:David S. Larsen、Anthony Schofield、Richard J. Stoodley、Peter D. Tiffin
DOI:10.1016/0040-4039(94)88489-7
日期:1994.12
New methodology for the stereoselective α-oxymethylation of esters/lactones is described.
描述了用于酯/内酯的立体选择性α-氧甲基化的新方法。
α-Amino-α-vinyl-γ-butyrolactone Derivatives from α-{[(Trimethylsilyl)methyl]alkylidene}-γ-butyrolactones
作者:Marinella Capuzzi、Augusto Gambacorta、Tecla Gasperi、M. Antonietta Loreto、P. Antonio Tardella