O-benzyl-N-((tert-butoxy)carbonyl)-L-tyrosine → (2S)-6-[[(2S)-3-(4-benzyloxyphenyl)-2-(tert-butoxycarbonylamino)propanoyl]amino]-2-[isobutyl(p-tolylsulfonyl)amino]hexanoic acid

Participants

Reaction Steps

The title compound was prepared from Nα-isobutyl-Nα-(4-methylbenzenesulfonyl)-L-lysine (100 mg, 0.29 mmol, example 1, step E) as described in general procedure Bc using commercially available Nα-tert-butoxycarbonyl-O-benzyl-L-tyrosine (111 mg, 0.3 mnol). The final product was triturated with ether to yield 145 mg (68%) of the desired material.

Provenance & Evidence