NOVELTY - Benzopyrrole acetonitrile is catalyzed and hydrogenated with 5% palladium carbon to obtain tryptamine (I). The intermediate (I) is formylated and cyclized using ethyl formate to obtain N-(2-(1H-indol-3-yl)-ethyl)-formamide (II). The intermediate (II) is cyclized in presence of trifluoroacetic acid to obtain 4,9-dihydro-3H-( beta )-carboline (III). The intermediate (III) is condensed with N-methyl-1H-benzo(d)(1,3)oxazine-2,4-dione to obtain evodiamine.    USE - Manufacture of evodiamine for use in pharmaceutical industry.    ADVANTAGE - Evodiamine is manufactured with improved yield by an economical and environmentally-friendly process.    DETAILED DESCRIPTION - Benzopyrrole acetonitrile is catalyzed and hydrogenated with 5% palladium carbon to obtain tryptamine (I), at 25-100 degrees C for 6-12 hours, in presence of solvent chosen from methanol, ethanol, dimethylformamide and acetonitrile. The weight ratio of the solvent is 4-10 folds of benzopyrrole acetonitrile. The intermediate (I) is reacted with ethyl formate for 12-24 hours and concentrated to obtain N-(2-(1H-indol-3-yl)-ethyl)-formamide (II). The mol ratio of the intermediate (I) to ethyl formate is 1:3-6. The intermediate (II) is reacted with trifluoroacetic acid dissolved in dichloromethane solution at 0 degrees C, and the temperature is raised to 15-25 degrees C. The contents are reacted for 2 hours, and the reaction mixture is post-treated, washed with water, liquid separated and the organic layer is dried with anhydrous sodium sulfate to obtain dichloromethane solution of 4,9-dihydro-3H-( beta )-carboline (III). The mol ratio of the intermediate (II) to the trifluoroacetic acid is 1:1.2-1.5. N-methyl-o-aminobenzoic acid is reacted with excessive ethyl chloroformate for 12-24 hours, and the obtained residual solution is recrystallized using to obtain N-methyl-1H-benzo(d)(1,3)oxazine-2,4-dione (IV). The mol ratio of the N-methyl o-aminobenzoic acid to excessive ethyl chloroformate is 1:3-6. The intermediate (III) and intermediate (IV) are condensed in nonpolar solvent for 3 hours. The reaction mixture is cooled and evodiamine is obtained. The solvent is dichloromethane, dichloroethane or chloroform.