tert-butyl (1S,9S)-4-hydroxy-4,5-dimethyl-9-[1-[(2-methylpropan-2-yl)oxycarbonyl]indol-3-yl]-3,6-dioxo-2,5,16-triazatetracyclo[7.7.0.02,7.010,15]hexadeca-7,10,12,14-tetraene-16-carboxylate 在
对甲苯磺酸 作用下,
以
甲苯 为溶剂,
反应 5.0h,
以79%的产率得到(±)-tert-butyl 10b-(1-(tert-butoxycarbonyl)-1H-indol-3-yl)-2-methyl-3-methylene-1,4-dioxo-1,2,3,4,5a,10b-hexahydro-6H-pyrazino[1',2':1,5]pyrrolo[2,3-b]indole-6-carboxylate