Asulam → (S)-methyl 4-(2-(6-chloro-3,4-dihydroquinolin-1(2H)-yl)-4-hydroxybutanamido)phenylsulfonylcarbamate

関与物質

反応手順

To a stirring suspension of the methyl 4-aminophenylsulfonylcarbamate (111 mg, 0.48 mmol) and CH2Cl2 (1 mL) under N2, at 0° C., was added trimethylaluminum (0.24 mL, 0.48 mmol) dropwise over 20 minutes. The solution was stirred at ambient temperature for 30 minutes. The solution was cooled to 0° C. followed by the dropwise addition of (S)-3-(6-chloro-3,4-dihydroquinolin-1(2H)-yl)dihydrofuran-2(3H)-one (100 mg, 0.40 mmol) in CH2Cl2 (1.0 mL) over 30 minutes. The solution was stirred at ambient temperature for 19 h. The solution was cooled to 0° C. and quenched by slow addition of aqueous 1.0 M HCl. The organic portion was washed with 1.0 N aqueous HCl (2×1.0 mL) and evaporated to dryness under reduced pressure. The crude product of (R)-methyl 4-(2-(6-chloro-3,4-dihydroquinolin-1(2H)-yl)-4-hydroxybutanamido)phenylsulfonylcarbamate was used without purification in the next step.

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