A Convenient Synthesis <b>o</b>f Pyranosyl-1-carbaldoximes
作者:Kenneth W. J. Baker、Andrew Gibb、Andrew R. March、Simon Parsons、R. Michael Paton
DOI:10.1081/scc-120018932
日期:2003.1.6
A simple high-yielding procedure is described for the preparation of tri-O-acetyl-beta-L-fucopyranosylformaldoxime (1) involving stannate(II)-mediated reduction of the readily accessible tri-O-acetyl-beta-L-fucopyranosylnitromethane (3). The D-mannosyl, D-glucosyl, D-galactosyl, and D-xylosyl analogues 7-12 were prepared similarly. The structure of tetra-O-acetyl-beta-D-mannopyranosylformaldoxime (7) was determined by X-ray crystallography.
The first synthesis of a nitromethylene-linked C-(1→2)-disaccharide
作者:Duy-Phong Pham-Huu、Mária Petrušová、James N. BeMiller、Ladislav Petruš
DOI:10.1016/s0040-4039(99)00363-9
日期:1999.4
The Michael addition of the 2,3:4,6-di-O-isopropylidene-beta-D-mannopyranosyl-nitromethane nucleophile to 1,2-dideoxy-3,4:5,6-di-O-isopropylidene-1-nitro-D-arabino-hex-1-enitol affords a dinitro adduct that can be regioselectively reduced on the primary nitromethyl group to the oxime of the corresponding nitromethylene-linked C-(1 --> 2)-disaccharide. (C) 1999 Published by Elsevier Science Ltd. All rights reserved.