PURPOSE:To obtain the titled compound useful as perfume, drugs, etc., in high yield and with industrial advantage, by using a palladium complex compound as a catalyst and subjecting a specific aminoolefin compound to ring formation in the presence of triethylamine in a solvent under heating. CONSTITUTION:An aminoolefin compound shown by formula I (R is H, lower alkyl, alkoxy, alkoxycarbonyl, nitro or halogen; R2 is acetyl, phenylketone or alkoxycarbonyl) is subjected to ring formation under heating in the presence of palladium acetate and a triphenylphosphine acid such as tri-O-tolylphosphinic acid, etc., as a catalyst and of triethylamine as a basic compound to scavenge HBr occurring as a by-product preferably in a solvent such as acetonitrile, etc., at =100 deg.C under pressure to give an indole shown by formula II. USE:A raw material for agricultural chemicals and drugs, especially a raw material for synthesizing alkaloides, etc.
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机译：目的：通过使用钯配合物作为催化剂，并在溶剂中在三乙胺存在下，使特定的氨基烯烃化合物成环，以高收率和工业优势获得用作香料，药物等的标题化合物在加热下。组成：将式I所示的氨基烯烃化合物（R为H，低级烷基，烷氧基，烷氧基羰基，硝基或卤素; R 2为乙酰基，苯酮或烷氧基羰基）在乙酸钯存在下加热加热成环。三苯基膦酸（例如三-O-甲苯基次膦酸等）作为催化剂，三乙胺（作为碱性化合物）清除HBr作为副产物，优选在溶剂（例如乙腈等）中，于> = 100 deg在压力下于.C下得到式II所示的吲哚。用途：农用化学品和药物的原料，尤其是生物碱的合成原料等。
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