Syntheses of the (±)-[n]-gingerols (pungent principles of ginger) and related compounds through regioselective aldol condensations: relative pungency assays
作者:Phillip Denniff、Ian Macleod、Donald A. Whiting
DOI:10.1039/p19810000082
日期:——
has been found to be regioselective (92 : 8 in favour of less-substituted enolate): the anion was condensed with alkanals and acyl imidazoles to give convenient syntheses of the (±)-[2]–[10]- and -[12]-gingerols (1) and [4]-, [6]-, and [8]-gingerdiones (9). Similarly, 3-methoxy-4-trimethylsilyloxybenzylideneacetone (17) gave the (±)-[2]–[10]-dehydrogingerols (8) and [4]-, [6]-, and [8]-dehydrogingerdiones
已发现在–78°C下用二异丙基氨基锂对三甲基甲硅烷基姜油酮(13)进行质子选择性(92:8,以取代基较少的烯酸酯为佳):将阴离子与链烷烃和酰基咪唑缩合,以方便地合成(±)-[2]-[10]-和-[12]-姜醇(1)和[4]-,[6]-和[8]-姜二酮(9)。同样,3-甲氧基-4-三甲基甲硅烷基氧苄叉基丙酮(17)给出了(±)-[2]-[10]-脱氢姜油酚(8)和[4]-,[6]-和[8]-脱氢姜二酮(10)。 。