Direct conversion of 1-deoxy-1-nitroalditols to methyl glycofuranosides
作者:M. Vojtech、M. Petrušová、B. Pribulová、L. Petruš
DOI:10.1016/j.tetlet.2008.03.044
日期:2008.5
Treatment of the sodium nitronate forms of 1-deoxy-1-nitrohexitols with methanolic sulfuric or hydrochloric acid at −30 °C leads to their regiospecific conversion to the corresponding methyl glycofuranosides. The reaction exhibits more pronounced stereoselectivity for 1-deoxy-1-nitroalditols with the 2,3-erythro configuration than with the 2,3-threo substrates and cis methyl glycofuranosides are the
Addition of nitromethane to D-xylose leads to the formation of two epimeric deoxynitroalditols, namely 1-deoxy-1-nitro-D-iditol and 6-deoxy-6-nitro-L-glucitol. Conversion of the former, obtainable in good yield by direct crystallisation, by a modified Nef reaction in an argon atmosphere afforded 68% of D-idose, which may readily be converted into 1,6-anhydro-beta-D-idopyranose ("D-idosan"). (C) 1998 Elsevier Science Ltd. All rights reserved.
KOLL, PETER;STENNS, CLAUDIA;SEELHORST, WILLI;BRANDENBURG, HEINZ, LIEBIGS ANN. CHEM.,(1991) N, C. 201-206