Synthesis of 2-<i>C</i>-Methyl-<scp>D</scp>-erythritol and 2-<i>C</i>-Methyl-<scp>L</scp>-threitol; Determination of the Absolute Configuration of 2-<i>C</i>-Methyl-1,2,3,4-butanetetrol Isolated from<i>Phlox sublata L</i>
作者:Isao SAKAMOTO、Kazuo ICHIMURA、Hiroshi OHRUI
DOI:10.1271/bbb.64.1915
日期:2000.1
2-C-Methyl-D-erythritol (A) and 2-C-methyl-L-threitol (B) were respectively synthesized from D-glucose and D-galactose. The 2-C-methyl-1,2,3,4-butanetetrol compound (C) recently isolated from Phlox sublata L was confirmed to be A by comparing the CD and 1H-NMR spoectra of its tri-O-benzoate with those of A and B.
The Dioxanone Approach to (2<i>S</i>,3<i>R</i>)-2-<i>C</i>-Methylerythritol 4-Phosphate and 2,4-Cyclodiphosphate, and Various MEP Analogues
作者:Chandraiah Lagisetti、Marek Urbansky、Robert M. Coates
DOI:10.1021/jo0711900
日期:2007.12.1
epoxide of (2S,4R)-4-tert-butyldimethylsilyloxymethyl-5-methylene-2-phenyl-1,3-dioxane, primary-selective phosphorylation, and cleavage of the silyl, benzylidene, and benzyl protecting groups. Regioselectivecleavage of the acetalring of 1,3-benzylidene 2-C-methylerythritol silyl ether by ozonolysis afforded a 1,2,3-triol 3-monobenzoate intermediate that was converted to the novel amino sugar, 1-amino-1
By a combination of stereospecific osmium catalyzed oxidation of dimethyl citraconate and lipase catalysed enantioselective resolution of the formed dimethyl (2R*,3S*)-2,3-dihydroxy-2-methylbutanedioate, followed by reduction, (2R,3S)- and (2S,3R)-2-methylbutane-1,2,3,4-tetraol were isolated. Similar reactions starting with dimethyl mesaconate gave the isomers, (2R,3R)- and (2S,3S)-2-methylbutane-1
Synthesis of 2-Methyl-<scp>d</scp>-erythritol via Epoxy Ester−Orthoester Rearrangement
作者:José-Luis Giner、William V. Ferris,、Joseph J. Mullins
DOI:10.1021/jo020168y
日期:2002.7.1
epoxy ester[bond]orthoester rearrangement has been applied to a new synthesis of 2-methyl-D-erythritol, a branched five-carbon sugar of importance to the deoxyxylulose pathway of isoprenoid biosynthesis. The intermediate orthoacetate is one of the few [2.2.1]-orthoesters to have been reported. Labeling studies with O-18 indicated that this reaction proceeds exclusively via a 5-exo cyclization. NMR analysis
been developed using the diastereocontrolled addition of organometallics to a (R)-cyclohexylideneglyceraldehyde-derived ketone as the key steps. The addition of vinylmagnesiumbromide to the ketone gave a 1:1 diastereomeric mixture of separable tertiary alcohols, which were converted to the target erythri- and threitols. On the other hand, the reaction of a dithianyl anion with the ketone gave only the