N-alpha-t-Butyloxycarbonyl-S-(4-methyl-benzyl)-L-cysteine → (2S)-6-[[(2R)-2-(tert-butoxycarbonylamino)-3-(p-tolylmethylsulfanyl)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-S-(4-methylbenzyl)-L-cysteine (67 mg, 0.3 mmol). The final product was triturated with ether to yield 130 mg (65%) of the desired material.

Provenance & Evidence