1,8-Diazabicyclo(5.4.0)undec-7-ene → HCID 57593139, compound

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Reaction Steps

To a stirring mixture of 9-{2-[2-(3-hydroxymethyl-phenyl) -1-methyl-ethylamino]-pyrimidin-4-yl}-2-phenyl-6,7,8,9-tetrahydro -pyrimido[1,2-a]pyrimidin-4-one (230 mg, 0.49 mmol), 1,8-diazabicyclo[5.4.0]undec-7-ene (0.13 mL, 0.88 mmol), and tetrahydrofuran (12 mL) at 0° C. under an atmosphere of nitrogen was added diphenylphosphoryl azide (0.19 mL, 0.88 mmol). Mixture stirred overnight warming to room temperature. Solvent removed under vacuum and product isolated as a white solid after purification on silica. M+1=494.

Provenance & Evidence