Water → (E)-N'-(4-(4,4,4-trifluoro-3-(3,4,5-trichlorophenyl)but-1-en-1-yl)phenyl)cyclopropanecarbohydrazide

To a stirred solution of (E)-(4-(4,4,4-trifluoro-3-(3,4,5-trichlorophenyl)but-1-en-1-yl)phenyl)hydrazine (0.1 g, 0.3 mmol) in CH2Cl2 (10 mL) was added DIPEA (65 mg, 0.51 mmol), HOBt.H2O (59 mg, 0.38 mmol), EDC.HCl (73 mg, 0.38 mmol) and cyclopropanecarbonyl chloride (0.024 g, 0.28 mmol), and the reaction mixture was stirred at ambient temperature for 1 h. The reaction mixture was diluted with satd aq NaHCO3 solution and extracted with CH2Cl2. The combined CH2Cl2 layer was washed with brine, dried over anhydrous Na2SO4, and concentrated under reduced pressure. Purification by flash column chromatography (SiO2; 5-25% EtOAc in petroleum ether) afforded the title compound as a solid (65 mg, 55%): mp 138-140° C.; 1H NMR (400 MHz, CDCl3) δ 9.81 (s, 1H), 7.90 (s, 1H), 7.84 (s, 2H), 7.34 (d, J=8.4 Hz, 2H), 6.65 (d, J=15.6 Hz, 1H), 6.61 (m, 1H), 6.57 (s, 1H), 6.48 (dd, J=15.6, 8.8 Hz, 1H), 4.74 (m, 1H), 1.64 (m, 1H), 0.75 (m, 4H); ESIMS m/z 461.32 ([M−H]−).

1. extractionextracted with CH2Cl2
2. washThe combined CH2Cl2 layer was washed with brine
3. dry with materialdried over anhydrous Na2SO4
4. concentrationconcentrated under reduced pressure
5. customPurification by flash column chromatography (SiO2; 5-25% EtOAc in petroleum ether)

ORD record

ord-733cf97063d14d718b1bc981738f1f56

Source dataset

uspto-grants-2015_12

DOI

10.6084/m9.figshare.5104873.v1

Patent number

US09211281B2