2177287-68-0

(R)-t-Butyl 2-((4-methyl-1-(1-methylcyclopropyl)-1-oxopentan-2-yl)amino)acetate is an intermediate in synthesizing (R)-2-Amino-4-methyl-1-((S)-2-methyloxiran-2-yl)pentan-1-one Trifluoroacetate Salt (A605100), an impurity of carfilzomib (C183460). Carfilzomib is a second-generation proteasome inhibitor that is used as a treatment in relapsed and refractory multiple myeloma.