| 中文名称 | 英文名称 | CAS号 | 化学式 | 分子量 |
|---|---|---|---|---|
| —— | Acetic acid (1S,2R,5R,6S)-5,6-diacetoxy-2-((3aR,4S,6R,7R,7aS)-7-acetoxy-4-acetoxymethyl-6-methoxy-2-oxo-tetrahydro-pyrano[3,4-d]oxazol-3-yl)-4-acetoxymethyl-cyclohex-3-enyl ester | 190713-01-0 | C27H35NO16 | 629.572 |
| —— | Acetic acid (1S,2R,5R,6S)-5,6-diacetoxy-2-((3aR,4S,6R,7R,7aS)-7-acetoxy-4-acetoxymethyl-6-bromo-2-oxo-tetrahydro-pyrano[3,4-d]oxazol-3-yl)-4-acetoxymethyl-cyclohex-3-enyl ester | 176389-19-8 | C26H32BrNO15 | 678.442 |
| —— | [(3aR,4S,6S,7R,7aS)-7-acetyloxy-2-oxo-6-phenylsulfanyl-3-[(1R,4R,5S,6S)-4,5,6-triacetyloxy-3-(acetyloxymethyl)cyclohex-2-en-1-yl]-4,6,7,7a-tetrahydro-3aH-pyrano[3,4-d][1,3]oxazol-4-yl]methyl acetate | 176389-20-1 | C32H37NO15S | 707.709 |
A glycosyl bromide derived from an Nlinked carba disaccharide has been converted into a phenyl thioglycoside and condensed with benzyl 2,3,6,2′,3′,6′-hexa-O-benzyl-β-cellobioside to give an N-linked carba tetrasaccharide. Complete removal of protecting groups then gave the 6′′-hydroxylated derivative of β-acarbose, coined ‘β-adiposin-2’, a putative inhibitor of enzymes that process β-D-glucosidic linkages.
The treatment of a 1-epivalienamine derivative with 1,6:3,4-dianhydro-2-O-benzyl-β-D-galactose has given an amino alcohol capable of conversion into either a cyclic carbamate or an aziridine. All attempts at acetolysis of the 1,6-anhydro ring of the cyclic carbamate failed owing to the inherent reactivity of the (allylic) benzyl ethers present in the molecule. Therefore, following a reduction with lithium in ammonia and acetylation of the product, a new cyclic carbamate was obtained which underwent successful acetolysis to provide a heptaacetate. This heptaacetate could be transformed into the desired methyl β-D-glucoside and base hydrolysis provided the 6-hydroxylated derivative of a diastereoisomer of methyl acarviosin, a putative inhibitor of enzymes which process β-D-glucosidic linkages.