The indenobenzazepine-spirobenzylisoquinoline rearrangement; stereocontrolled syntheses of (±)-raddeanine and (±)-yenhusomine
作者:Gábor Blaskó、Natesan Murugesan、Alan J. Freyer、Daniella J. Gula、Bilge Şener、Maurice Shamma
DOI:10.1016/s0040-4039(01)81847-5
日期:1981.1
Stereoselective rearrangement of indenobenzazepine cis ketols and with TPAA in pyridine produces spirobenzylisoquinolines and , respectively. The latter product is also obtained by rearrangement of trans ketol . The transformation of ketols and must, therefore, proceed through the intermediacy of aziridinium cation . A similar process obtains in the transformation of to . NaBH4 reduction of gives (±)-raddeanine
茚并苯并ze庚因顺式酮醇的立体选择性重排以及在吡啶中用TPAA分别产生螺环苄基异喹啉和。后一种产物也可以通过反式酮醇的重排获得。酮醇的改造和必须的,因此,继续通过氮丙啶阳离子的中间性。一个类似的过程获得在转化到。将NaBH 4还原,得到(±)-raddeanine()。直接重新排列二醇供应。(±)-Yenhusomine()由二醇或的重配得到。同样,二醇和供应螺苄异喹啉。