Benzyl Bromide → HCID 11488850, compound

Participants

Reaction Conditions

Reaction Steps

(2S)-2-tert-Butoxycarbonylamino-3-(4-hydroxy-3-iodo-phenyl)-propionic acid (490 mg. 1.2 mmol) of Step A is stirred in EtOAc (3.6 mL) with DIEA (418 μL, 2.4 mmol) at RT under N2. Benzyl bromide (171 μL, 1.44 mmol) is then added and the reaction mixture is then heated to 90° C. overnight. TLC in 3/1 hexane/EtOAc shows complete consumption of starting material (ninhydrin positive) and the appearance of two higher rf spots. The reaction is cooled to RT, diluted with EtOAc and washed with 1N HCl (2×30 mL) and with saturated NaHCO3 (2×30 mL). The organics are dried (MgSO4), filtered and concentrated to provide a mixture of mono- and dibenzylated products. Flash chromatography (3:1 hexane/EtOAc) affords the title compound, (2S)-2-tert-butoxycarbonylamino-3-(4-hydroxy-3-iodo-phenyl)-propionic acid benzyl ester.

Provenance & Evidence