A One-Pot Cascade to Protoberberine Alkaloids via Stevens Rearrangement of Nitrile-Stabilized Ammonium Ylides
作者:Günther Lahm、Jan-Gernot Deichmann、Anna Lisa Rauen、Till Opatz
DOI:10.1021/jo502842s
日期:2015.2.6
A facile one-pot synthesis of protoberberines from readily accessible 1,2,3,4-tetrahydroisoquinoline-1-carbonitriles and 1,2-bis(bromomethyl)arenes is described. The reaction cascade comprises four consecutive transformations, all of which can be effected under a single set of conditions. Ten protoberberines, including the alkaloids pseudopalmatine and pseudoepiberberine, were prepared in yields up
描述了从容易获得的1,2,3,4-四氢异喹啉-1-腈和1,2-双(溴甲基)芳烃轻松合成一锅小ber碱的方法。反应级联反应包括四个连续的转化,所有这些转化都可以在一组条件下进行。根据该策略,制备了十种原小ber碱,包括生物碱类伪帕金汀和伪小iber碱,收率高达86%。不需要色谱纯化产物,并且该路线没有任何保护基操纵。