Reaction of Sugar Esters with Hydrogen Fluoride. II. Isomerisation of Penta-O-acetyl- and Penta-O-benzoyl-alpha-D-mannopyranose.
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چکیده
منابع مشابه
2,3,6,3′,4′-Penta-O-acetyl-4,1′,6′-trichloro-4,1′,6′-trideoxysucrose
In the title compound, C(22)H(29)Cl(3)O(13), the glucopyran ring exists in the chair conformation while the glucofuran ring adopts an envelope conformation. Intra-molecular C-H⋯O hydrogen bonds occur. In the crystal, adjacent mol-ecules are linked by weak inter-molecular C-H⋯O hydrogen bonds.
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متن کامل7-Functionalized 7-deazapurine ribonucleosides related to 2-aminoadenosine, guanosine, and xanthosine: glycosylation of pyrrolo[2,3-d]pyrimidines with 1-O-acetyl-2,3,5-tri-O-benzoyl-D-ribofuranose.
[reaction: see text] The Silyl-Hilbert-Johnson reaction as well as the nucleobase-anion glycosylation of a series of 7-deazapurines has been investigated, and the 7-functionalized 7-deazapurine ribonucleosides were prepared. Glycosylation of the 7-halogenated 6-chloro-2-pivaloylamino-7-deazapurines 9b-d with 1-O-acetyl-2,3,5-tri-O-benzoyl-D-ribofuranose (5) gave the beta-D-nucleosides 11b-d (73...
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ژورنال
عنوان ژورنال: Acta Chemica Scandinavica
سال: 1963
ISSN: 0904-213X
DOI: 10.3891/acta.chem.scand.17-0673