Sodium Azide → Azido-PEG6-C1-Boc

Participants

Reaction Conditions

Reaction Steps

Sodium azide (1.5 g, 23 mmol) was added to a solution of compound 3 (1.9 g, 4.1 mmol) in dry DMF (50 mL) and the resulting mixture was stirred at 80° C. overnight. The reaction mixture was concentrated in vacuo and then triturated with CH2Cl2 (20 mL) and filtered to remove sodium azide. The filtrate was concentrated in vacuo and the residue was loaded onto a silica gel gravity column (200 g) and eluted with CH2Cl2:MeOH 100:0 to 20:1 (v/v) to afford compound 4 as a colorless oil (1.0 g, 57%).

Provenance & Evidence