Reaktion #689782

Reaktionsgleichung

N-(2-acetyl-4-chlorophenyl)trifluoromethanesulfonamide

N,N-Dimethylethylenediamine

N-(5-chlorothiophen-2-ylmethoxy)phthalimide

acetic acid

→

N-{4-chloro-2-[1-(5-chlorothiophen-2-ylmethoxyimino)ethyl]phenyl}trifluoromethanesulfonamide

Ausbeute 90.0%

Lösungsmittel

EtOH

EtOH

Reaktionsbedingungen

Aufarbeitung

1. 1
   workup.ADDITIONwas then added
2. 2
   EinengenThe reaction mixture was concentrated under vacuum
3. 3
   Sonstigethe residue purified by column chromatography (eluting with CH2Cl2/PE, 1:1)

Vorschrift

N,N-Dimethylethylenediamine (178 μL, 1.54 mmol) was added to a solution of N-(5-chlorothiophen-2-ylmethoxy)phthalimide (220 mg, 0.75 mmol) in EtOH (5 mL), and the reaction allowed to stir at RT for 15 h Glacial acetic acid (1 mL) was then added to adjust the mixture to ca. pH 4 followed by a solution of N-(2-acetyl-4-chlorophenyl)trifluoromethanesulfonamide 19 (211 mg, 0.70 mmol) in EtOH (2 mL), and the mixture stirred for 15 h at RT. The reaction mixture was concentrated under vacuum, and the residue purified by column chromatography (eluting with CH2Cl2/PE, 1:1) to afford N-{4-chloro-2-[1-(5-chlorothiophen-2-ylmethoxyimino)ethyl]phenyl}trifluoromethanesulfonamide 194 (280 mg, 90%), as white crystals. 1H n.m.r. (400 MHz, CDCl3) δ 11.37, br s, 1H, 7.63, d, J=8.8 Hz, 1H, 7.48, d, J=24 Hz, 1H, 7.33, dd, J=2.4 and 8.8 Hz, 1H, 6.94, d, J=3.8 Hz; 6.81, d, J=3.8 Hz; 5.24, s, 2H, 2.33, s, 3H. HRMS (M+) 445.9540. N-(5-Chlorothiophen-2-ylmethoxy)phthalimide was prepared using the procedure reported in U.S. Pat. No. 4,071,533.

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