Catalysts are substances that increase the reaction rate of a chemical reaction without being consumed in the process. Introducing a new discovery about 92420-89-8, Name is (2S,3S,4S,5R,6R)-2-(Methoxycarbonyl)-6-(2,2,2-trichloro-1-iminoethoxy)tetrahydro-2H-pyran-3,4,5-triyl triacetate, HPLC of Formula: C15H18Cl3NO10.
beta-D-GlcpA-(1?2)-alpha-D-Manp-(1?3)-[beta-D-Xylp- (1?2)]-alpha-D-Manp-(1?3)[-beta-D-Xylp-(1?2)]-alpha-D- Manp, the repeating unit of the exopolysaccharide from Cryptococcus neoformans serovar A, was synthesized as its allyl glycoside. Thus, 3-O-selective acetylation of allyl 4,6-O-benzylidene-alpha-D-mannopyranoside afforded 2, and subsequent glycosylation of 2 with 2,3,4-tri-O-benzoyl-D-xylopyranosyl trichloroacetimidate furnished the beta-(1?2)-linked disaccharide 4. Debenzylidenation followed by benzoylation gave allyl 2,3,4-tri-O-benzoyl-beta-D-xylopyranosyl-(1?2)-3-O-acetyl-4,6-di-O- benzoyl-alpha-D-mannopyranoside (5), and selective 3-O-deacetylation gave the disaccharide acceptor 6. Coupling of 6 with 2-O-acetyl-3,4,6-tri-O-benzoyl-alpha-D-mannopyranosyl trichloroacetimidate yielded the trisaccharide 8, and subsequent deallylation and trichloroacetimidation gave 2,3,4-tri-O-benzoyl-beta-D-xylopyranosyl-(1?2)-[2-O-acetyl-3,4,6-tri- O-benzoyl-alpha-D-mannopyranosyl-(1?3)]-4,6-di-O-benzoyl-alpha-D- mannopyranosyl trichloroacetimidate (9). Condensation of the trisaccharide donor 9 with the disaccharide acceptor 6 gave the pentasaccharide 10 whose 2-O-deacetylation gave the acceptor 11. Glycosylation of 11 with methyl 2,3,4-tri-O-acetyl-alpha-D-glucopyranosyluronate trichloroacetimidate and subsequent deprotection gave the target hexasaccharide.
Balanced chemical reaction does not necessarily reveal either the individual elementary reactions by which a reaction occurs or its rate law.HPLC of Formula: C15H18Cl3NO10. In my other articles, you can also check out more blogs about 92420-89-8
Reference：
Tetrahydropyran – Wikipedia,
Tetrahydropyran – an overview | ScienceDirect Topics