Ethyl 2-isocyanato-2-methylpropanoate → 2(R)-[1(S)-(Hydroxycarbamoyl)-4-phenylbutyl]-4-methyl-N-(4,4-dimethyl-2,5-dioxo-1-imidazolidinyl)valeramide

Participants

Reaction Steps

The 2(R)-[1(S)-[(tetrahydro-2(RS)-pyranyloxy)carbamoyl]-4-phenylbutyl]-4-methyl-N-(4,4-dimethyl-2,5-dioxo-1-imidazolidinyl)valeramide used as the starting material was prepared in a manner analogous to that described in Example 7, part (ii) and Example 1, parts (vii) and (viii), starting from 2(R)-[1(S)-(tert-butoxycarbonyl)-4-phenylbutyl]-4-methylvalerohydrazide and ethyl 2-isocyanato-2-methylpropionate.

Provenance & Evidence