arylhydrazines 2, cyclize under acidic conditions to 8-methyl-10-aryl-10H-naphtho-[1,8a,8-fg]indazol-7-ones 4. Indazoles 4 are also obtained from 2-acetyl-3-hydroxy-1H-phenalen-1-one (1) and arylhydrazines 2 in a one-pot reaction. 2-Acetyl-3-azido-1H-phenalen-1-one (6) does not give 8-methyl-9-arylamino-9H-naphtho[1,8a,8-fg]indazol-7-ones via azide decomposition but gives again by nucleophilic replacement of the
3-羟基-2- [1-(芳基亚
肼基)乙基] -1- ħ -phenalen -1-酮3,从2-乙酰基-3-羟基-1-获得ħ -phenalen -1-酮(1)和芳基
肼2,在酸性条件下环化成8-甲基-10-芳基-10 H-
萘-[1,8a,8 - f g]
吲唑-7-酮4。
吲哚4也可以通过一锅反应从2-乙酰基-3-羟基-1H-苯并-1-酮(1)和芳基
肼2获得。2-乙酰基-3-
叠氮基-1 H-苯并-1-酮(6)没有给出8-甲基-9-芳基
氨基-9 H-
萘[1,8a,8- fg]
吲唑-7-通过
叠氮化物分解,但通过亲核取代
叠氮化物部分6再次得到
吲唑4。