反应详情

温度

0 °C

Lithium aluminium hydride (1.0 M solution in tetrahydrofuran, 0.66 mL, 0.66 mmol, 2.0 eq) is added at 0° C. to a stirred solution of trans-4-[(3-oxo-3,4-dihydro-2H-benzo[1,4]thiazine-6-carbonyl)-amino]-cyclohexanecarboxylic acid methyl ester (127 mg, 0.33 mmol, 1.0 eq) in tetrahydrofuran (2 mL). After 1 hour stirring at 0° C., the reaction mixture is cautiously quenched with ice-water (3 mL). Tetrahydrofuran is evaporated and the crude is extracted with ethyl acetate (3×10 mL) and water (10 mL). The combined organic layers are dried over sodium sulfate, filtered and concentrated to afford 3-oxo-3,4-dihydro-2H-benzo[1,4]thiazine-6-carboxylic acid (trans-4-hydroxymethyl-cyclohexyl)-amide as a yellow solid (47 mg, 40% yield).

1. customthe reaction mixture is cautiously quenched with ice-water (3 mL)
2. customTetrahydrofuran is evaporated
3. extractionthe crude is extracted with ethyl acetate (3×10 mL) and water (10 mL)
4. dry with materialThe combined organic layers are dried over sodium sulfate
5. filtrationfiltered
6. concentrationconcentrated