A Hetero-Diels−Alder Approach to Phosphonothiashikimic Acid and New Thiaglycosides
作者:Montserrat Heras、Mihaela Gulea、Serge Masson、Christian Philouze
DOI:10.1002/ejoc.200300334
日期:2004.1
Phosphonodithioformates undergo hetero-Diels−Alder cycloadditions with a variety of dienes. In some cases, Lewis acid catalysts were used to control the rate and selectivity of the reactions. Selective radical desulfanylation and subsequent dihydroxylation of the cycloadducts allowed the syntheses of new thiapyran derivatives and, in particular, a phosphono and thio analogue of shikimic acid. (© Wiley-VCH Verlag
膦二硫代甲酸酯与各种二烯发生杂 Diels-Alder 环加成反应。在某些情况下,路易斯酸催化剂用于控制反应的速率和选择性。环加合物的选择性自由基脱硫基化和随后的二羟基化允许合成新的噻喃衍生物,特别是莽草酸的膦酰基和硫代类似物。(© Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2004)