Mono- or dibromo derivatives 2 and 3 were prepared by an efficient two-step route from 10-methyl-azepino[3,4-b]indole-1,5-dione 1. Elimination reaction on 2 gave access to 4-bromo-10-methyl-2H,10H-azepino[3,4-b]indole-1,5-diones 4. Finally, 4-substituted 10-methyl-2H,10H-azepino[3,4-b]indole-1,5-diones 6–14 were synthesised in good yields from 4 via palladium-mediated cross-coupling reactions.
单或二
溴衍
生物2和3是通过有效的两步路线从10-甲基-氮杂
环庚烷[3,4- b ]
吲哚-1,5-二酮1制备的。在2上进行消除反应可得到4-
溴-10-甲基-2 H,10 H-氮杂
环庚烷[3,4- b ]
吲哚-1,5-二酮4。最后,4-取代的10-甲基- 2 ħ,10 ħ -azepino [3,4 b ]
吲哚-1,5-二酮6 - 14是在从良好的收率合成4通过
钯介导的交叉偶联反应。