[structure: see text]. A novel stereoselective approach to the ring system of the mitomycins is described. The synthesis was based on a convergent strategy involving a stereocontrolled addition of a beta-phenyl silyl enol ether to a pyrroline N-acyliminium ion followed by an intramolecular palladium-catalyzed aryl triflate amination to afford the (9R*,9aR*)-tetrahydropyrrolo[1,2-a]indole ring system.
[结构:见文字]。描述了一种新颖的针对丝
裂霉素环系统的立体选择性方法。该合成基于一种收敛策略,该策略包括将β-苯基甲
硅烷基烯醇醚立体控制地添加到
吡咯啉N-酰基
亚胺离子上,然后进行分子内
钯催化的
三氟甲磺酸芳基胺化反应,得到(9R *,9aR *)-
四氢吡咯并[ 1,2-a]
吲哚环系统。