Diisopropylethylamine → 6-{2-[4-(4-methoxy-benzothiazole-2-carbonyl)-piperidin-1-yl]-acetyl}-4H-benzo[1,4]oxazin-3-one

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Reaction Steps

A mixture of (4-methoxy-benzothiazol-2-yl)-piperidin-4-yl-methanone (83 mg, 0.3 mmol) and 6-(2-chloro-acetyl)-4H-benzo[1,4]oxazin-3-one (68 mg, 0.3 mmol) in DMF (1 ml) was treated with DIPEA (50 μl, 0.3 mmol) and the mixture was stirred at RT overnight. The mixture was poured on water and extracted with EtOAc. The organic layers were dried over MgSO4 and concentrated. Crystallisation from ether gave 113 mg (81%) of title compound as a beige solid.

Provenance & Evidence