N-(2-hydrazinyl-2-oxoethyl)benzamide

Conditions: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: Synthesis was performed from (2S)-2-({(2S)-2-[(tert-butoxycarbonyl)amino]-3-phenylpropanoyl}amino)-3-[3-(methoxycarbonyl)-4-(2-methoxy-2-oxoethoxy)phenyl]propanoic acid (100 mg, 0.18 mmol) and hippuric acid hydrazide (42 mg, 0.22 mmol) according to Method C with HPLC purification to give the title compound (24 mg). IR (KBr) 3274, 1652, 1616 cm−1; HRMS m/z 705.2640 (calc. of monoisotopic mass for C35H39N5O11 gives 705.2646). Synthesis according to Method C with HPLC purification