Synthesis, NMR studies and theoretical calculations of novel 3-spiro-branched ribofuranoses
摘要:
Novel spiro-branched sugar derivatives bearing a spiro-5'-(4'-amino-2'-oxazolone) or a spiro-5'-(4'amino-1',2',3'-oxathiazole-2',2'-dioxide) rings at position-3 of the sugar moiety have been prepared. The synthesis has been achieved by a one-pot procedure from a conveniently protected sugar cyanohydrin derivative by reaction with chlorosulfonyl isocyanate or sulfamoyl chloride, respectively. The tautomeric preference in solution of these novel 3-spiro sugars are described as derived from NMR spectroscopy. Also a comparative theoretical study, by ab-initio methods, of the steric and electronic properties of the spiro rings present in these sugar derivatives has been performed. (C) 1999 Elsevier Science Ltd. All rights reserved.
Steric and Electronic Properties of the 3′-spiro Moiety of TSAO-T and Analogues
摘要:
The synthesis and study of geometrical and stereoelectronic properties of the spiro moiety of tof novel TSAO analogues modified at the 3'-spiro moiety is described.
Novel spiro-branched sugar derivatives bearing a spiro-5'-(4'-amino-2'-oxazolone) or a spiro-5'-(4'amino-1',2',3'-oxathiazole-2',2'-dioxide) rings at position-3 of the sugar moiety have been prepared. The synthesis has been achieved by a one-pot procedure from a conveniently protected sugar cyanohydrin derivative by reaction with chlorosulfonyl isocyanate or sulfamoyl chloride, respectively. The tautomeric preference in solution of these novel 3-spiro sugars are described as derived from NMR spectroscopy. Also a comparative theoretical study, by ab-initio methods, of the steric and electronic properties of the spiro rings present in these sugar derivatives has been performed. (C) 1999 Elsevier Science Ltd. All rights reserved.
Steric and Electronic Properties of the 3′-spiro Moiety of TSAO-T and Analogues
作者:M. J. Pérez-Pérez、R. Alvarez、M. L. Jimeno、A. San-Félix、A. Lozano、M. J. Camarasa
DOI:10.1080/15257779908041661
日期:1999.4
The synthesis and study of geometrical and stereoelectronic properties of the spiro moiety of tof novel TSAO analogues modified at the 3'-spiro moiety is described.