1,2-Dichloroethane → Benzyl [(1S)-1-[(benzyloxy)methyl]-2-({(2S)-2,5-bis[(tert-butoxycarbonyl)amino]pentyl}amino)-2-oxoethyl]carbamate

Participants

Reaction Steps

Preparation takes place in analogy to Example 79A from 150 mg (0.46 mmol) of O-benzyl-N-[(benzyloxy)carbonyl]-L-serine and 188 mg (0.59 mmol) of tert-butyl{(4S)-5-amino-4-[(tert-butoxycarbonyl)amino]pentyl}carbamate (Example 86A) in 6 ml of dimethylformamide with the addition of 114 mg (0.57 mmol) of EDC and 18 mg (0.13 mmol) of HOBt. The product is purified by preparative RP-HPLC (mobile phase water/acetonitrile gradient: 90:10→5:95).

Provenance & Evidence