Ethyl 3-chloro-3-oxopropionate → 6-Chloro-4-hydroxy-1-(4-methoxy-benzyl)-2-oxo-1,2-dihydro-quinoline-3-carboxylic acid ethyl ester

温度

80 °C

A solution of 9 (0.13 g, 0.38 mmol) in 3 mL of anhydrous benzene was treated with ethyl-3-chloro-3-oxopropionate (54 μL, 63.0 mg, 0.421 mmol). The reaction mixture was heated to 80° C. for 1 h. The reaction was allowed to cool to room temperature and was concentrated in vacuo. The resulting oil was dissolved in 3 mL of ethanol, treated with NaOEt (40.0 mg, 0.59 mmol). The suspension was heated to 80° C. for 10 min, allowed to cool to room temperature, and diluted with H2O. The resulting precipitate was filtered to give 10 (63.0 g, 43%) as a white solid.

1. temperatureto cool to room temperature
2. concentrationwas concentrated in vacuo
3. dissolutionThe resulting oil was dissolved in 3 mL of ethanol
4. temperatureThe suspension was heated to 80° C. for 10 min
5. temperatureto cool to room temperature
6. filtrationThe resulting precipitate was filtered

ORDレコード

ord-45b995454dc34d469cd0b5c55c4e7183

出典データセット

uspto-grants-2006_03

DOI

10.6084/m9.figshare.5104873.v1

特許番号

US07019141B2