反应详情

温度

0 °C

To a solution of 2-chloro-5-nitro-benzaldehyde (31.01 g, 167.1 mmol) in 330 mL of anhydrous DMP at 0° C. was added K2CO3 (27.80 g, 201.1 mmol), followed by slow addition of mercapto-acetic acid ethyl ester (18.5 mL, 168.7 mmol). After stirring at 0° C. for 20 min, the resulting mixture was allowed to warm to rt and stir at rt overnight. The reaction mixture was then poured into 1.5 L of water. The solid formed was filtered and washed with 600 mL of water. After drying, 5-nitro-benzo[b]thiophene-2-carboxylic acid ethyl ester was obtained as pale solid. MS (EI): cal'd 252.0 (MH+), exp 252.1 (I).

1. temperatureto warm to rt
2. stirringstir at rt overnight
3. customThe solid formed
4. filtrationwas filtered
5. washwashed with 600 mL of water
6. customAfter drying