72080-89-8

N-[(1S)-1-[(Dimethylamino)carbonyl]-3-methylbutyl]-carbamic Acid 1,1-Dimethylethyl Ester is an intermediate in the synthesis of (S)-2-Amino-4-methyl-1-((S)-2-methyloxiran-2-yl)pentan-1-one Trifluoroacetate Salt which is an impurity of carfilzomib (C183460). Carfilzomib is a second-generation proteasome inhibitor that is used as a treatment in relapsed and refractory multiple myeloma.