Synthesis of eleven-carbon monosaccharides using nitrile oxide/isoxazoline chemistry
作者:Karen E. McGhie、R.Michael Paton
DOI:10.1016/s0040-4039(00)73574-x
日期:1993.4
A stereocontrolled route to 6-deoxyundecose derivatives has been developed based on cycloaddition of 5-carbon arabinose-derived nitrileoxides to 6-carbon carbohydrate alkenes and reductive hydrolytic cleavage of the resulting isoxazolines.
The nitrile oxide/isoxazoline approach to eleven-carbon monosaccharides: cycloaddition of d- and l-arabinonitrile oxides to 5,6-dideoxyhex-5-enofuranoses and characterisation of the resulting 2-isoxazolines
作者:Robert O. Gould、Karen E. McGhie、R.Michael Paton
DOI:10.1016/s0008-6215(98)00323-1
日期:1999.11
reaction of nitrileoxide 5 with d -Man-derived alkene 8 proceeded similarly yielding 4,5-dihydroisoxazoles 17 and 18 (82:18). Comparable levels of π-facial selectivity (66–76% d.e.) in favour of 5R-adducts were observed for the reactions of l -Ara-derived nitrileoxide 6 with alkenes 7 and 8 to form dihydroisoxazoles 23 / 24 and 25 / 26 , thus demonstrating that the configuration of the nitrileoxide component
The nitrile oxide–isoxazoline approach to 11-carbon monosaccharides. Conversion of 3-(tetritol-1-yl)-5-(tetrofuranos-4-yl)-2-isoxazolines into 6-deoxyundecoses
作者:Karen E. McGhie、R.Michael Paton
DOI:10.1016/s0008-6215(99)00168-8
日期:1999.9
analysis of their 5,7- O -isopropylidene derivatives. 6-Deoxy- l - manno -d-gluco- and l -gluco-d-gluco -undecose analogues 19 and 20 were prepared similarly from the isomeric 3-( l - arabino -tetritolyl)-4,5-dihydroisoxazole. Removal of the isopropylidene protecting groups from compounds 17 and 20 yielded 3- O -benzyl-6-deoxy- d-gluco- and l - manno -d-gluco -undecopyranoses, which