A convenient synthesis of 1-(S)-[1′-(S)-(t-butyloxycarbonylamino)-2′-phenylethyl]oxirane. A useful building block in the synthesis of HIV protease inhibitors
A new short route to epoxide 6b, a pivotal intermediate for the preparation of hydroxyethylamine dipeptide isosteres has been developed. Opening of the epoxide by anthranilic acid, followed by extensions in the gave the target compounds which were evaluated as HIV-1 protease inhibitors.