Sodium Carbonate → HCID 67186523, compound

Participants

Reaction Steps

To a solution of 2,6-dibromo-4-carboxybenzylamine (20 g, 0.064 mol) in dioxane (500 mL), was added an aqueous solution of Na2CO3 (10%, 410 mL) with stirring. After stirring at 26° C. for 15 min was added Fmoc-OSu (30.5 g, 0.09 mol) in portions for 2 h and allowed to stir at ambient temperature for 24 h. The solid precipitate was filtered off and washed with diethyl ether (3×200 mL), followed by methanol (3×200 mL). The solid salt was acidified with an aqueous solution of HCl (3 N, 100 mL) to pH=2. The precipitate was filtered under suction and dried. The crude solid was recrystalised from methanol/diethyl ether to give N-(Fmoc)-2,6-dibromo-4-carboxybenzylamine (30 g, 87%) as a solid.

Provenance & Evidence