Dimethylformamide → HCID 15411307, compound

Participants

Reaction Steps

7-[3- (2-Quinolinylmethoxy)benzylidenamino]-3,4-dihydro-2H-1,4-benzothiazin-3-one (6.383 g, 15 mmol) obtained in Example 91 was dissolved in a mixed solvent consisting of 200 ml of DMF and 50 me of MeOH, followed by the addition of 2.26 g (60 mmol) of NaBH4 in small portions. After the resultant mixture was stirred for 30 minutes at room temperature, the solvent was distilled off under reduced pressure. Water was added to the residue, followed by extraction with CHCl3. The extract was washed with water, dried over MgSO4 and then concentrated. The concentrate was recrystallized from MeOH-AcOEt, whereby 5.117 g of the title compound were obtained as white powder (yield: 79.8%).

Provenance & Evidence