作者:Alex Romero、Chi-Huey Wong
DOI:10.1021/jo000933d
日期:2000.12.1
Sequential enzymatic aldol reaction and bis-reductive amination leads to the total syntheses of tetrahydroxylated pyrrolizidine alkaloids, 3-epiaustaline (14), australine (1), and 7-epialexine (11). This approach allows for their rapid construction without the need for protecting group manipulation of the hydroxyl functionality. In addition, an improved procedure for the asymmetric epoxidation of divinyl
顺序的酶醛醇缩醛反应和双还原胺化反应可合成四羟基吡咯烷核生物碱,3-表氨司他林(14),奥曲林(1)和7-表艾利辛(11)。该方法允许它们的快速构建,而无需保护羟基官能团的基团操纵。另外,描述了改进的二乙烯基甲醇(3)不对称环氧化的方法,并将该产物用于所需三醇7和ent-7的简明合成中。