Dichloromethane → 3-{[({(3S,4S)-1-[2-(7-fluoro-2-oxo-1(2H)-quinolinyl)ethyl]-4-hydroxy-3-pyrrolidinyl}methyl)amino]methyl}-5H-pyridazino[3,4-b][1,4]thiazin-6(7H)-one

Participants

Reaction Steps

A solution of 1-{2-[(3S,4S)-3-(aminomethyl)-4-hydroxy-1-pyrrolidinyl]ethyl}-7-fluoro-2(1H)-quinolinone (100 mg; 0.33 mmol) and 6-oxo-6,7-dihydro-5H-pyridazino[3,4-b][1,4]thiazine-3-carbaldehyde (for a synthesis see WO2004058144, Example 58) (65 mg, 0.33 mmol) in methanol (2 mL), DCM (4 mL) was stirred at room temperature overnight. Sodium triacetoxyborohydride (210 mg; 1.0 mmol) was added and the mixture was stirred at room temperature for 4 h. The reaction was evaporated and chromatographed on silica gel, eluting with 0-10% methanol-DCM-1% NH4OH to give 42 mg of the title compound as an oil which solidified to an off-white powder upon standing.

Provenance & Evidence