synthetic strategy of pseudodistomin was developed by first synthesizing the (±)-(2a,4β,5β)-5-amino-2(3-hydroxypropyl)piperidin-4-o1 14 as a key intermediate via a route involving the reductive photocyclisation of enamide 5 followed by the introduction of a three-carbon side-chain by application of an α-acylamino photo-induced radical allylation by allyltributyltin replacing a methylsulfanyl group. The key
通过首先通过涉及还原性光环化的途径合成作为关键中间体的(±)-(2a,4β,5β)-5-
氨基-2(3-羟丙基)
哌啶-4-o14 14来开发拟假
单孢菌素的合成策略烯酰胺5的制备,然后通过用
烯丙基三丁基锡代替甲基
硫烷基进行α-酰基
氨基光诱导的自由基烯丙基化而引入三碳侧链。然后将关键中间体14转化为带有二烯基侧链的
哌啶19和20,它们具有拟假单胞菌素A 1和B 2的结构。但是,与天然
生物碱的
三乙酸酯直接比较表明,建议的结构是必需的。