Synthesis and reactions of an (α-d-glucopyranosyl)phenylacetylene
摘要:
Silver tetrafluoroborate promoted addition of (phenylethynyl)tributylstannane to 6-O-acety-1,2,3,4-tri-O-benzyl-alpha-D-glucopyranosyl chloride stereoselectively gave a crystalline (alpha-D-glucopyranosyl)phenylacetylene (4) in 73% yield. Compound 4 was epimerized to the beta isomer through its hexacarbonyldicobalt complex, and was also converted into a C-alpha-glycosyl aldehyde (8) by sequential zinc reduction and ozonolysis. The sensitive aldehyde 8 was conveniently isolated and manipulated through its 1,3-diphenylimidazolidine derivative.
Synthesis and reactions of an (α-d-glucopyranosyl)phenylacetylene
摘要:
Silver tetrafluoroborate promoted addition of (phenylethynyl)tributylstannane to 6-O-acety-1,2,3,4-tri-O-benzyl-alpha-D-glucopyranosyl chloride stereoselectively gave a crystalline (alpha-D-glucopyranosyl)phenylacetylene (4) in 73% yield. Compound 4 was epimerized to the beta isomer through its hexacarbonyldicobalt complex, and was also converted into a C-alpha-glycosyl aldehyde (8) by sequential zinc reduction and ozonolysis. The sensitive aldehyde 8 was conveniently isolated and manipulated through its 1,3-diphenylimidazolidine derivative.