Sodium Carbonate → HCID 68425473, compound

Participants

Reaction Steps

(R)-3-(4-Bromo-phenyl)-2-tert-butoxycarbonylamino-propionic acid (4.0 g, 11.6 mmol), 3-chlorophenylboronic acid (2.36 g, 15.11 mmol), Pd(PPh3)4 (0.067 g, 0.058 mmol) and 2M Na2CO3 aqueous solution (8.0 mL) are refluxed in 1,2-dimethoxyethane (70 mL) for 2.5 h under N2 atmosphere. After cooling to room temperature, the reaction mixture is diluted with EtOAc and washed with 1M HCl and brine. The organic layer is dried over Na2SO4 and concentrated. The residue is purified by flash column chromatography (silica gel, DCM/10% MeOH in DCM=100:0 to 0:100). to give (R)-2-tert-butoxycarbonylamino-3-(3′-chloro-biphenyl-4-yl)-propionic acid (containing impurities). HPLC retention time=1.56 minutes (condition A): MS (m+1)=376.

Provenance & Evidence