227930-76-9

Upstream product

• 100-51-6 benzyl alcohol 
• 110205-68-0 1,3,4,5-tetra-O-benzyl-6,7-dideoxy-L-xylo-hept-6-en-2-ulose 
• 1189-71-5 isocyanate de chlorosulfonyle 
• 124330-54-7 (1S,4R,5S,6S)-4,5,6-tris(benzyloxy)-3-((benzyloxy)methyl)-N-((1S,2S,3S,4R,5R)-2,3,4-tris(benzyloxy)-5-((benzyloxy)methyl)cyclohexyl)cyclohex-2-enamine 
• 501-53-1 benzyl chloroformate 
• 227930-71-4 3,4,5-tri-O-benzyl-6-C-[(benzyloxy)methyl]-1,2,7,8-tetradeoxy-D-gluco-octa-1,7-dienitol 
• 227930-75-8 (1D)-(1,3,4/2)-1,2,3-tri-O-benzyl-4-C-[(benzyloxy)methyl]cyclohex-5-ene-1,2,3,4-tetrol 
• 227930-72-5 (1D)-(1,3,4/2)-1,2,3-tri-O-benzyl-4-C-[(benzyloxy)methyl]cyclohex-5-ene-1,2,3,4-tetrol 

Downstream Products

• 74645-52-6 (1L)-(1,3,4/2)-4-acetamido-1,2,3-tri-O-acetyl-4-[(acetoxy)methyl]cyclohex-5-ene-1,2,3-triol 
• 38231-86-6 valienamine 

Relevant academic research and scientific papers

Total synthesis of (+)-valienamine and (-)-1-epi-valienamine via a highly diastereoselective allylic amination of cyclic polybenzyl ether using chlorosulfonyl isocyanate

The total synthesis of (+)-valienamine and (-)-1-epi-valienamine was concisely accomplished from readily available d-glucose via a highly diastereoselective amination of chiral benzylic ether using chlorosulfonyl isocyanate, intramolecular olefin metathesis, and diastereoselective reduction of cyclic enone using l-Selectride as the key steps.

Pseudoglycosyltransferase catalyzes nonglycosidic C-N coupling in validamycin a biosynthesis

Glycosyltransferases are ubiquitous in nature. They catalyze a glycosidic bond formation between sugar donors and sugar or nonsugar acceptors to produce oligo/polysaccharides, glycoproteins, glycolipids, glycosylated natural products, and other sugar-containing entities. However, a trehalose 6-phosphate synthase-like protein has been found to catalyze an unprecedented nonglycosidic C-N bond formation in the biosynthesis of the aminocyclitol antibiotic validamycin A. This dedicated 'pseudoglycosyltransferase catalyzes a condensation between GDP-valienol and validamine 7-phosphate to give validoxylamine A 7′-phosphate with net retention of the 'anomeric configuration of the donor cyclitol in the product. The enzyme operates in sequence with a phosphatase, which dephosphorylates validoxylamine A 7′-phosphate to validoxylamine A.

Carbasaccharides via ring-closing alkene metathesis. A synthesis of (+)- valienamine from D-glucose

(+)-Valienamine (16) was prepared in seven steps and in an overall yield of 17% from commercially available 2,3,4,6-tetra-O-benzyl-D-glucopyranose. Stereoselective addition of vinylmagnesium bromide to the 1,3,4,5-tetra-O- benzyl-6,7-dideoxy-L-xylo-hept-6-en-2-ulose (2) gave diene 3 (86%). Ring- closing alkene metathesis of 3 in the presence of 0.15 equiv, of Grubb's catalyst 1 gave the cyclohexene 4 (58%), that was converted into (+)- valienamine (16) in three steps and in 47% yield. Similarly, ring-closing alkene metathesis of the D-mannose-derived diene 20 gave the cyclohexene 21 (89%).