中文名称 | 英文名称 | CAS号 | 化学式 | 分子量 |
---|---|---|---|---|
—— | Acetic acid (2R,3R,4S,5R,6R)-3,5-diacetoxy-2-acetoxymethyl-6-allyloxy-tetrahydro-pyran-4-yl ester | —— | C17H24O10 | 388.372 |
中文名称 | 英文名称 | CAS号 | 化学式 | 分子量 |
---|---|---|---|---|
—— | Hexadecanoic acid (R)-1-hexadecanoyloxymethyl-2-((2R,3R,4S,5R,6R)-3,4,5-triacetoxy-6-acetoxymethyl-tetrahydro-pyran-2-yloxy)-ethyl ester | 60660-96-0 | C49H86O14 | 899.213 |
—— | (2R)-2-hydroxy-3-mesitylsulfonyloxypropyl tetra-O-acetyl-β-D-glucopyranoside | 130705-48-5 | C26H36O14S | 604.629 |
(2R)- and (2S)-2,3-Epoxypropyl, (3R)- and (3S)-3,4-epoxybutyl and (4S)- 4,s-epoxypentyl B- Dglucopyranoside , together with the (3R)- and (3s)-3,4-epoxybutyl β- cellobiosides , have been prepared by condensation of a glycosyl bromide with the appropriate enantiomer of a chiral alcohol containing a diol protected as an isopropylidene acetal, and subsequent manipulation of the unmasked diol into the epoxide function. As well, in an improvement to the whole process, both diastereoisomers of the various epoxypropyl and epoxybutyl glycosides were available from just the one enantiomer of the alcohol by an alternative manipulation of the diol. Finally, precursors to 2,3-epoxy-4-hydroxybutyl β-D-glucosides and β- cellobiosides were prepared in high optical purity by Sharpless asymmetric epoxidation of the appropriate 4-hydroxybut-2-enyl glycosides.
The asymmetric dihydroxylation of various alkenyl tetra-O-acetyl- β-D-glucopyranosides has given mixtures of diols which, in one instance, has yielded a pure diastereoisomer upon recrystallization. This optically pure diol has been converted into an episulfide, a putative inhibitor of β-D-glucan hydrolases