Silicon tetrachloride → 2-[3-(5-Benzyl-tetrazol-1-yl)-phenyl]-3,3-dimethyl-1,2,3,4-tetrahydro-quinoline-6-carboxylic acid ethyl ester

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Reaction Steps

To a stirred solution of tetrachlorosilane (6.0 mL, 52 mmol), sodium azide (5.1 g, 78.1 mmol) in dry acetonitrile (20 mL) was added 3,3-dimethyl-2-(3-phenylacetylamino-phenyl)-1,2,3,4-tetrahydro-quinoline-6-carboxylic acid ethyl ester (2.3 g, 5.2 mmol) at room temperature. Then the mixture solution was stirred at room temperature for over night. LC/MS showed that reaction finished completely. The reaction mixture was poured into ice-cold saturated aqueous sodium bicarbonate solution and extracted with ethyl acetate (2×200 mL), washed with brine, dried over anhydrous sodium sulfate and concentrated in vacuo. Purification by flash silica gel chromatography (silica gel from QingDao, 200-300 mesh, glass column from Shanghai SD company) (40% ethyl acetate/hexanes) afforded 2-[3-(5-benzyl-tetrazol-1-yl)-phenyl]-3,3-dimethyl-1,2,3,4-tetrahydro-quinoline-6-carboxylic acid ethyl ester (1.4 g, 58.3%) as a white solid: LC/MS m/e calcd for C28H29N5O2 (M+H)+: 468.58, observed: 468.1.

Provenance & Evidence