The invention of radical reactions. Part XXXVIII. Homologation of car☐ylic acids with acrylamide and synthetic studies of 3-deoxy-D-arabino-2-heptulosonic acid (DAH) and its 4-epimer
作者:Derek H.R. Barton、Wansheng Liu
DOI:10.1016/s0040-4020(97)00543-7
日期:1997.8
Alkyl radicals generated from O-acyl derivatives of N-hydroxy-2-thiopyridone added onto acrylamide at room temperature to form crystalline 2-(2-pyridylsulfanyl)-car☐amides. Desulfurization of the latter by nickel boride at room temperature afforded primary amides in quantitative yield. 3-Deoxy-D-arabino-2-heptulosonic acid (DAH), its 4-epimer, and their derivatives were effectively synthesized from
A route to 3-deoxy-4-O-methyl-D-manno-oct-2-ulosonic acid (4-O-methyl-KDO) and its D-gluco isomer derivatives
作者:Zbigniew Pakulski、Aleksander Zamojski
DOI:10.1016/s0040-4020(97)00094-x
日期:1997.3
Methoxymercuration of α, β-unsaturated ketoester 5 (readily obtained from peracetylated D-gluconic acid 1 via Barton ester) led to a separable mixture of KDO derivative 9 and its D-gluco isomer 10.