Water → Ethyl [3-(10H-pyrazino[2,3-b][1,4]benzothiazin-8-ylmethyl)-3-azabicyclo[3.1.0]hex-6-yl]carboxylate

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Reaction Conditions

Reaction Steps

To a solution of 1.523 g of ethyl(3-azabicyclo[3.1.0]hex-6-yl)carboxylate in N,N-dimethylformamide (30 ml) were added 2.30 g of sodium hydrogencarbonate and 1.39 g of 8-chloromethyl-10H-pyrazino[2,3-b][1,4]benzothiazine and the resulting mixture was heated to 80° C. for 2 hours. After adding water and ethyl acetate, the organic layer was washed with water, dried over magnesium sulfate and concentrated under reduced pressure. Then the residue was purified by silica gel column chromatography (eluted with dichloromethane/methanol) to thereby give 0.574 g of the title compound as pale yellow crystals.

Provenance & Evidence