Triethylamine → (S)-N-[5-(4-Methylpiperazin-1-yl)-3,4-dihydro-2H-1-benzopyran-3-yl]-4-morpholinobenzenesulfonamide

Participants

Reaction Steps

To a solution of (S)-3-amino-5-(4-methylpiperazin-1-yl)-3,4-dihydro-2H-1-benzopyran (120 mg, 0.485 mmol) in anhydrous methylene chloride (10 mL) were added triethylamine (81 μL, 0.582 mmol) and 4-(4-morpholinyl)benzenesulfonyl chloride (140 mg, 0.534 mmol; described in: Galliani, G. Eur. Pat. Appl. EP 335,758, 1989, Chem. Abstr. 1990, 112, 98374d [125393-22-8]). The reaction mixture was stirred at room temperature for 4 h, washed with a 2 M NH3 solution, dried (MgSO4) and concentrated in vacuo. The crude product was purified by column chromatography on silica (eluent: chloroform/ethanol, 90:10+0.5% conc. NH3) affording 141 mg (61% yield) of the title compound as a white solid: mp sinters>100° C.; [α]22D+10° (c 1.0, chloroform); EIMS (70 eV) m/z (relative intensity) 472 (56, M30 ).

Provenance & Evidence