A directed metalation route to the zwitterionic indole alkaloids.
作者:Gordon W. Gribble、Timothy C. Barden、David A. Johnson
DOI:10.1016/s0040-4020(01)85951-2
日期:1988.1
3-a]quinolzine(1)ring system. Application of this methodology to 2-(2-pyridinyl)indole 17, which is prepered via Taylor-Boger triazine Dieis-Alder annulation chemistry, affords the zwitterionic indole alkaloid sempervirine (3).
涉及2-(2-吡啶基)吲哚(4→5)的β-锂化以及随后与溴乙醛反应的合成方案导致吲哚[2,3-a]喹诺嗪(1)环系统。将此方法应用于通过Taylor-Boger三嗪Dieis-Alder环化化学方法制备的2-(2-吡啶基)吲哚17,可得到两性离子吲哚生物碱sempervirine(3)。