128947-68-2

Upstream product

• 50-99-7 D-glucose 
• 98-59-9 p-toluenesulfonyl chloride 
• 2280-44-6 D-Glucose 
• 108-24-7 acetic anhydride 

Downstream Products

• 115002-50-1 O¹,O³,O⁴-triacetyl-6-thiocyanato-O²-(toluene-4-sulfonyl)-6-deoxy-α-D-glucopyranose 
• 103725-99-1 3,4-di-O-acetyl-2,6-di-O-tosyl-α-D-glucopyranosyl bromide 
• 4631-19-0 3,4,6-tri-O-acetyl-2-O-p-toluenesulfonyl-α-D-glucopyranosyl bromide 
• 103726-01-8 3,4-di-O-acetyl-6-deoxy-6-iodo-2-O-tosyl-α-D-glucopyranosyl bromide 
• 4581-93-5 1,3,4,6-tetra-O-acetyl-2-O-p-toluenesulfonyl-α-D-glucopyranose 

Relevant academic research and scientific papers

1,6-Anhydro-1-thio-β-D-glucopyranose (thiolevoglucosan) and the corresponding sulfoxides and sulfone

Starting 1,2,3,4-tetra-O-acetyl-6-O-tosyl-β-D-glucopyranose (3) was converted into 2,3,4-tri-O-acetyl-1-thio-6-O-tosyl-β-D-glucopyranose (6) via intermediate glycosyl bromide 4 and S-thiouronium salt 5. Treatment of compound 6 with sodium methoxide gave 1,6-anhydro-1-thio-β-D-glucopyranose (thiolevoglucosan 2a). The isomeric sulfoxides 7 and 8 were prepared by selective oxidation of thiolevoglucosan 2a with hydrogen peroxide or 3-chloroperoxybenzoic acid. The structure of new compounds was confirmed by 1H and 13C NMR spectroscopy or by X-ray analysis; magnetic anisotropy of the sulfinyl and sulfonyl group has been discussed.

Synthesis of sulfur-linked analogues of nigerose, laminarabiose, laminaratriose, gentiobiose, gentiotriose, and laminaran trisaccharide Y

Sulfur-linked analogues of 3-O-α-D-glucopyranosyl-D-glucose (nigerose), 3-O-β-D-glucopyranosyl-D-glucose (laminarabiose), 6-O-β-D-glucopyranosyl-D-glucose (gentiobiose), O-β-D-glucopyranosyl-(1 → 3)-O-β-D-glucopyranosyl-(1 → 3)-D-glucose (laminaratriose), O-β-D-glucopyranosyl-(1 → 6)-O-β-D-glucopyranosyl-(1 → 6)-D-glucose (gentiotriose) and 3,6-di-O-β-D-glucopyranosyl-D-glucose (laminaran trisaccharide Y), namely, respectively, 3-thionigerose (6), 3-thiolaminarabiose (II), 6-thiogentiobiose (21), 3(I),3(II)-dithiolaminaratriose (16), 6(I),6(ii)-dithiogentiotriose (29) and 3(I),6(I)-dithiolaminaran trisaccharide Y (37) have been conveniently prepared by S(N)2 reactions of the corresponding anomer of D-glucopyranose 1-thiolate with suitably activated monosaccharide derivatives in N,N-dimethylformamide (for 6 and 21) or in tetrahydrofuran in the presence of a crown ether (for 11). A sequence involving the reaction of non-anomeric thiolates with 2,3,4,6-tetra-O-acetyl-α-D-glucopyranosyl bromide was alternatively used for the preparation of 11 and 21 but proved less satisfactory. The preparation of thiotrisaccharides 16, 29, and 37 involved a mixed approach.