18417-89-5Relevant articles and documents
Pyrrolo[2,3-d]pyrimidine nucleoside antibiotics. Total synthesis and structure of toyocamycin, unamycin B, vengicide, antibiotic E-212, and Sangivamycin (BA-90912).
Tolman,Robins,Townsend
, p. 524 - 526 (1968)
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COMPOUNDS, COMPOSITIONS AND METHODS FOR TREATING VIRAL INFECTION
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Page/Page column 109, (2010/12/18)
The present invention describes compounds of formulae I and II and methods for treating viral infection, such as Flaviviridae virus infection, including Hepatitis C infection (HCV).
Synthesis of 5'-fluoro-5'-deoxy- and 5'-amino-5'-deoxytoyocamycin and sangivamycin and some related derivatives
Sharma,Li,Ledvina,Bobek
, p. 1831 - 1852 (2007/10/02)
A series of 5'-substituted analogs of toyocamycin were prepared by condensation of silylated 4-amino-6-bromo-5-cyanopyrrolo[2,3-d]pyrimidine with protected 5-azido-5-deoxy- or 5-fluoro-5-deoxyribofuranose followed by debromination and deblocking. Alternatively, 5'-azido-5'-deoxytoyocamycin was prepared by azidation of toyocamycin. Conversion of the 5-nitrile function of the toyocamycin derivatives into a carboxamide or a thiocarboxamide gave the corresponding analogs of sangivamycin or thiosangivamycin while reduction of the 5'-azido-5'-deoxy nucleosides provided 5'-amino-5'-deoxy derivatives.
2' AND 3'-KETONUCLEOSIDES AND THEIR ARABINO AND XYLO REDUCTION PRODUCTS CONVENIENT ACCESS VIA SELECTIVE PROTECTION AND OXIDATION OF RIBONUCLEOSIDES
Hansske, Fritz,Madej, Danuta,Robins, Morris J.
, p. 125 - 135 (2007/10/02)
A number of 2',5'- or 3',5'-diprotected ribonucleosides and 5'-protected 2'- or 3'-deoxy-β-D-erythro-pentofuranosyl nucleosides have been oxidized to the corresponding 3' or 2'-ketonucleoside derivatives using chromium trioxide/pyridine/acetic anhydride or dimethyl sulfoxide/acetic anhydride.Reduction of the carbonyl functions with sodium borohydride gave the inverted arabino, xylo, or deoxy-threo isomers as predominant products by attack at the less hindered α-face of the sugar ring.Parallel reductions using sodium borodeuteride corroborated the epimeric ratios by demonstrating that complete oxidation of the original hydroxyl groups had occured.The deuterium labeling also aided in making NMR spectral assignments.