Spirocyclic restriction of nucleosides. An analysis of protecting group feasibility while accessing prototype
L A Paquette1, D R Owen, R T Bibart
1Evans Chemical Laboratories, The Ohio State University, Columbus, Ohio 43210, USA. paquette.1@osu.edu
Organic Letters
|December 12, 2001
Abstract:
[reaction: see text] The first spirocyclic nucleoside featuring a beta-hydroxyl (anti) at C5' has yielded to synthesis. While the OMOM functionality proved to be sensitive to the conditions necessary to incorporate heterocyclic bases, PMB protection of the carbinol was readily accommodated. The remarkably similar minimum-energy conformations of the title compounds relative to natural thymidine as deduced by Amber calculations in the gas phase are noted.
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