Reductive Cyclization of δ-Hydroxy Nitriles: A New Synthesis of Glycosylamines
作者:Andrew D. Dorsey、Jennifer E. Barbarow、Dirk Trauner
DOI:10.1021/ol035111s
日期:2003.9.1
[reaction: see text] The stereoselective cyclization of delta-hydroxy nitriles to afford N,O-acetals and the application of this reaction toward the synthesis of glycosylamines is described.
Synthesis of Galactose- andN-Acetylglucosamine-Derived Tetrazoles and their evaluation as ?-glycosidase inhibitors
作者:Thomas D. Heightman、Philipp Ermert、Daniela Klein、Andrea Vasella
DOI:10.1002/hlca.19950780221
日期:1995.3.22
NaN3 yielded the tetrazole 25, which was deprotected to 6. The tetrabenzyl ether 16 (from 14, or from 25via27) was reduced to 28 and deprotected to give the known deoxygalactostain 8 (Scheme 2). Oxidation of the hydroxynitrile 30, derived from 29, followed by reduction of 32 yielded mostly the L-ido-hydroxynitrile (Scheme 3), which was tosylated and treated with NaN3 to give the tetrazole 35a and its manno-isomer