O1CCCC1.[Cl-].[Al+3].[Cl-].[Cl-].[C:10]([CH2:12][C:13]1[CH:14]=[CH:15][C:16]2[C:22](=[O:23])[CH2:21][C:20]3[CH:24]=[CH:25][CH:26]=[CH:27][C:19]=3[S:18][C:17]=2[CH:28]=1)#[N:11].[N-:29]=[N+:30]=[N-:31].[Na+]>O>[NH:29]1[C:10]([CH2:12][C:13]2[CH:14]=[CH:15][C:16]3[C:22](=[O:23])[CH2:21][C:20]4[CH:24]=[CH:25][CH:26]=[CH:27][C:19]=4[S:18][C:17]=3[CH:28]=2)=[N:11][N:31]=[N:30]1Add to 25 cc. of tetrahydrofuran cooled in an ice bath 1.59 gm. (11.9 mmole) of aluminum chloride, 1.33 gm. (5.25 mmole) of 3-cyanomethyl-10,11-dihydro-11-oxodibenzo[b,f]thiepin and 1.55 gm. (23.8 mmole) of sodium azide. Reflux the mixture for 19 hours, cool, dilute with water and acidify. Extract the mixture into ethyl acetate and evaporate. Triturate the residue in ether and separate the title product by filtration.
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