A New Stereospecific Synthesis of 1,2,4-Trideoxy-1,4-Imino-D-Erythro-Pentitol
摘要:
1,2,4-Trideoxy-1,4-imino-D-erythro-pentitol [(2R,3S)-3-hydroxy-2-hydroxymethylpyrrolidine] (4) was synthesised from 2,5-di-O-tosyl-D-ribono-1,4-lactone in 42 % overall yield. The hey steps were deoxygenation at C-2 and a stereospecific inversion of the configuration at C-4. Compound 4 inhibited alpha-D-glucosidase (K-i = 25 mu M) and beta-D-glucosidase (K-i = 80 mu M).
Dihydroxylation-Based Approach for the Asymmetric Syntheses of Hydroxy-γ-butyrolactones
作者:Jennifer Peed、Iwan R. Davies、Lucy R. Peacock、James E. Taylor、Gabriele Kociok-Köhn、Steven D. Bull
DOI:10.1021/jo2021289
日期:2012.1.6
NOE spectroscopy, which revealed that 1-substituted, 1,1-disubstituted, (E)-1,2-disubstituted, (Z)-1,2-disubstituted, and 1,1,2-trisubstituted alkenes undergo dihydroxylation with anti-diastereoselectivity, while 1,2,2-trisubstituted systems afford syn-diastereoisomers. The synthetic utility of this methodology has been demonstrated for the asymmetric synthesis of the natural product 2-deoxy-d-ribonolactone
Synthesis of 2-deoxyxylolactone from glycerol derivatives via highly enantioselective carbon-hydrogen insertion reactions
作者:Michael P. Doyle、Alexey B. Dyatkin、Jason S. Tedrow
DOI:10.1016/s0040-4039(00)76684-6
日期:1994.6
Diazodecomposition of 1,3-dialkoxy-2-propyl diazoacetates catalyzed by chiral dirhodium(II) carboxamides results in highly enantioselective and diastereoselective carbon-hydrogen insertion which forms 3,5-dialkyl 2-deoxyxylolactones in up to 98% enantiomeric excess.
Stereocontrol in organic synthesis using silicon-containing compounds. Syntheses of (±)-2-deoxyribonolactone and (±)-arabonolactone
作者:Ian Fleming、Sunil K. Ghosh
DOI:10.1039/a804282i
日期:——
Samarium iodide reacts with methyl (Z)-3-dimethyl(4-methylphenyl)silylprop-2-enoate 5b to give dimethyl (3RS,4SR)-3,4-bis[dimethyl(4-methylphenyl)silyl]hexane-1,6-dioate 8b with high stereoselectivity. This meso diester can be converted into (3RS,4SR)-3,4-bis[dimethyl(4-methylphenyl)silyl]pentan-5-olide 16 by Dieckmann cyclisation, demethoxycarbonylation and Baeyer–Villiger reaction. Silyl-to-hydroxy
The oxylactonization of 3-silyloxy-4-alkenamides proceeds stereoselectively by treatment with m-chloroperbenzoic acid to give the corresponding 2-deoxy-DL-ribono-1,4-lactone derivatives.