1,8-Diazabicyclo(5.4.0)undec-7-ene → HCID 86619586, compound

Participants

Reaction Steps

To a 0° C. mixture of (7-benzyloxy-2,2-dimethyl-benzo[1,3]dioxol-5-yl)-methanol (0.57 g, 2.0 mmol) and diphenylphosphoryl azide (0.52 mL, 2.4 mmol) in tetrahydrofuran (10 mL) is added 1,8-diazabicyclo[5.4.0]undec-7-ene (DBU, 0.33 mL, 2.2 mmol). The mixture is allowed to warm to room temperature over the weekend and then quenched with the addition of water. The reaction mixture is extracted 3× with ethyl acetate, and the combined extracts were washed with 5% aqueous potassium hydrogen sulfate solution and saturated aqueous sodium chloride solution, dried over anhydrous sodium sulfate, and then concentrated to give 6-azidomethyl-4-benzyloxy-2,2-dimethyl-benzo[1,3]dioxole, which is used in the next step without purification.

Provenance & Evidence