中文名称 | 英文名称 | CAS号 | 化学式 | 分子量 |
---|---|---|---|---|
1-羟基-7-甲基咔唑-2-甲醛 | 7-methyl-1-hydroxycarbazole-2-carbaldehyde | 106551-59-1 | C14H11NO2 | 225.247 |
—— | 2-acetyl-7-methyl-1-hydroxycarbazole | 836612-59-0 | C15H13NO2 | 239.274 |
—— | 1-hydroxy-7-methyl-2-(trifluoroacetyl)carbazole | 1431462-51-9 | C15H10F3NO2 | 293.245 |
The reaction of methyl 2-(1-oxo-2,3,4,9-tetrahydro-1 H-carbazol-2-yl)oxoacetates (1a-e) with hydroxylamine hydrochloride in alcoholic KOH afforded 1-hydroxyimino-2,3,4,9-tetrahydro-1 H-carbazoles (2a-e), and in acetic acid methyl isoxazolo[5,4- a]carbazole-3-carboxylates (3a-e). Ketoesters 1a-e with urea and thiourea under acidic conditions yielded a mixture of the respective 1-hydroxycarbazoles (6a-e) and 2,3,4,9-tetrahydro-1 H-carbazol-1-ones (7a-e), but under basic conditions the respective 1-carbimido- and 1-thiocarbimido-2,3,4,9-tetrahydro-1 H-carbazoles (8a-e and 9a-e) were formed. Plausible mechanisms are proposed.