3-Chloropropionyl chloride → 3-chloro-N-[2-chloro-4-formyl-5-(methyloxy)phenyl]propanamide

온도

20 °C

3-Chloropropionyl chloride (98.4 ml, 1.0 mol) was added over 30 minutes to a stirred suspension of 4-amino-5-chloro-2-methoxybenzaldehyde (47.4 g, 0.26 mol) ensuring the reaction temperature did not exceed 20° C. After the addition was complete the reaction was stirred at 20° C. for a further 2 hours and then filtered. The filtrate was concentrated to 150 ml under reduced pressure and then diluted with ethyl acetate (100 ml) and water (400 ml). The mixture was stirred at 20° C. for 1 hour and then filtered to give 3-chloro-N-[2-chloro-4-formyl-5-(methyloxy)phenyl]propanamide as an off-white solid which was not isolated but suspended in tetrahydrofuran (730 ml) and treated with diisopropylethylamine (154 ml, 0.88 mol). The resulting mixture was stirred at 45° C. for 46 hours and then concentrated under reduced pressure to leave a residue which was diluted with ethyl acetate (300 ml), washed with 2M hydrochloric acid (4×100 ml) and concentrated under reduced pressure to give N-[2-chloro-4-formyl-5-(methyloxy)phenyl]-2-propenamide (37.8 g, 62%).

1. customdid not exceed 20° C
2. additionAfter the addition
3. filtrationfiltered
4. concentrationThe filtrate was concentrated to 150 ml under reduced pressure
5. additiondiluted with ethyl acetate (100 ml) and water (400 ml)
6. stirringThe mixture was stirred at 20° C. for 1 hour
7. filtrationfiltered

ORD 기록

ord-eb56ee9ad16448248d38f0519d43cbc1

출처 데이터셋

uspto-grants-2013_08

DOI

10.6084/m9.figshare.5104873.v1

특허 번호

US08519138B2