反应详情

温度

85 °C

Prepared using General Procedure 3. To a solution of (S)-tert-butyl 4-cyano-2,3-dihydro-1H-inden-1-yl(2-(dimethylamino)-2-oxoethyl)carbamate (3.8 g, 11.07 mmol) in EtOH (20 mL) was added hydroxylamine hydrochloride (1.92 g, 27.67 mmol) and triethylamine (2.8 g, 27.67 mmol). The reaction solution was heated to 85° C. for 2 h. The solvent was removed under vacuum and the residue partitioned between DCM (3×10 mL) and water (10 mL). The combined organic layers were dried over MgSO4 and concentrated under vacuum to produce 4.10 g (87.7%) of (S)-tert-butyl 2-(dimethylamino)-2-oxoethyl(4-(N-hydroxycarbamimidoyl)-2,3-dihydro-1H-inden-1-yl)carbamate, which was 65% pure and used directly in the next experiment. LCMS-ESI (m/z) calculated for C19H28N4O4; 376.45. found 377.2 [M+H]+, tR=1.85 min.

1. customPrepared
2. customThe solvent was removed under vacuum
3. customthe residue partitioned between DCM (3×10 mL) and water (10 mL)
4. dry with materialThe combined organic layers were dried over MgSO4
5. concentrationconcentrated under vacuum