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.
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-C-methylerythritols and 2-C-methylthreitols via enantiodivergent Sharpless dihydroxylation of trisubstituted olefins
作者:Shibaji K. Ghosh、Mark S. Butler、Martin J. Lear
DOI:10.1016/j.tetlet.2012.03.071
日期:2012.5
The mevalonate-independent pathway (MIP) is an interesting avenue for antimicrobial lead discovery. Here, we present a unified enantioselectivesynthesis of all four stereoisomers of 2-C-methyltetrol. These are usefulbuildingblocks of many bioactive natural products, including 2-C-methylerythritol phosphate (MEP) of the MIP biosynthetic pathway.
Asymmetric Synthesis of (<i>S</i>,<i>S</i>)- and (<i>R</i>,<i>R</i>)-2-Methylthreitol
作者:Dieter Enders、Evelyn Peiffer、Gerhard Raabe
DOI:10.1055/s-2007-965967
日期:2007.4
The asymmetric synthesis of ( S, S)- and ( R, R)-2-methylthreitol was carried out, starting from the SAMP or RAMP hydrazone of 2,2-dimethyl-1,3-dioxan-5-one. The protocol involves an enantioselective α-alkylation as a key step. The second stereogenic center was installed by either nucleophilic 1,2-addition or diastereo-selective epoxidation with bis(acetylacetonato)oxovanadium(IV) [VO(acac) 2 ] as