4-Methylmorpholine → 4-(2-Benzyloxycarbonylamino-acetyl)-6-(naphthalen-1-ylcarbamoyl)-hexahydro-pyrrolo[3,2-b]pyrrole-1-carboxylic acid tert-butyl ester

Participants

Reaction Steps

A solution of Cbz-Gly-OH (250 mg, 1.20 mmol) in NMP (2 mL) was cooled to 0° C. and treated with HATU (502 mg, 1.32 mmol) followed by NMM (0.2 mL). After 10 min, 54 (360 mg, 0.95 mmol) in NMP (2 mL) was added. The reaction mixture was allowed to warm to ambient temperature overnight. The solution was diluted with EtOAc, washed successively with 1M HCl, saturated NaHCO3, dried over anhydrous Na2SO4, filtered and concentrated. Purification by reverse phase HPLC (2″ Dynamax® C18, 10-70% ACN in H2O with 0.1% HOAc over 30 min) afforded 55 as a white solid (400 mg). Mass spectrum, m/z [573.2] (M+H)+.

Provenance & Evidence