Procedures for obtaining ribo-C-nucleosides
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United States of America Patent
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May 25, 1999
Grant Date -
N/A
app pub date -
Feb 20, 1996
filing date -
Feb 17, 1995
priority date (Note) -
Expired
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Abstract
Novel procedures for obtaining ribo-C-nucleosides, including especially 2-.beta.-D-ribofuranosylthiazole-4-carboxylamide (tiazofirin) and 2-.beta.-D-ribofuranosylselenazole-4-carboxylamide (sylenazofurin) and synthesis intermediates thereof. The novel procedures involve introducing a cyano group at the 1' position of a ribose, directly or indirectly converting the cyano group to HN.dbd.C--OR.sub.1 or thicarboxylamide wherein R.sub.1 is a lower alkyl, forming the group which substituted for the cyano group into a heterocyclic ring containing an ester, and converting the ester into an amide.
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