Potassium Carbonate → (R)-3-[N'-t-Butoxycarbonyl-N-(3'-chlorobiphenyl-4-ylmethyl)-hydrazino]-2-hydroxy-propionic Acid

Participants

Reaction Conditions

Reaction Steps

(R)-3-[N-(4-Bromobenzyl)-N′-t-butoxycarbonyl-hydrazino]-2-hydroxy-propionic acid methyl ester (1.0 g, 2.5 mmol), 3-chlorophenylboronic acid (776 mg, 5.0 mmol), and K2CO3 (857 mg, 6.2 mmol) were dissolved in a mixture of THF (18 mL) and water (18 mL). The reaction flask was then purged with nitrogen and tetrakis(triphenylphosphine) palladium(0) (286 mg, 248 μmol) was added. The mixture was stirred at 90° C. overnight (˜18 hours). The mixture was diluted with saturated aqueous ammonium chloride and extracted with EtOAc. The organic layer was collected, dried and concentrated. The product was purified (Interchim reverse phase chromatography column, 10-80% MeCN in water) to yield the title compound.

Provenance & Evidence