Tetrahydrofuran → HCID 86731028, 화합물

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To a mixture of tert-butyl N-[(4aR*,6R*,8aR*)-3-cyano-8-methyl-6-(propylcarbamoyl)-4H,4aH,5H,6H,7H,8H,8aH,9H-thieno[3,2-g]quinolin-2-yl]-N-methylcarbamate (412 mg) and tetrahydrofuran (5 mL) was added a 1 mol/L sodium hexamethyldisilazide-tetrahydrofuran solution (1.2 mL) at −40° C. After stirring at the same temperature for 20 minutes, 4-nitrophenyl chloroformate (242 mg) was added to the mixture, and then stirred for 1 hour. After warming to room temperature and stirring for 1.5 hours, water and ethyl acetate were added. After the separated organic layer was dried over anhydrous sodium sulfate, it was concentrated under reduced pressure. The residue was purified by silica gel column chromatography (eluent: 80%-100% ethyl acetate/hexane, gradient elution) to give 4-nitrophenyl N-{[(4aR*,6R*,8aR*)-2-{[(tert-butoxy)carbonyl](methyl)amino}-3-cyano-8-methyl-4H,4aH,5H,6H,7H,8H,8aH,9H-thieno[3,2-g]quinolin-6-yl]carbonyl}-N-propylcarbamate (405 mg).

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