tert-Butoxycarbonyl-L-leucyl-L-valine trichloroethyl ester (Boc-L-Leu-L-Val-OTce)

Abstract

The title compound, C18H31Cl3N2O5, an enanti­opure dipeptide trichloro­ethyl ester, is one of two starting fragments in the synthesis of cyclo­sporin O analogs. In the crystal structure, mol­ecules are linked by N—H⋯O=C hydrogen bonds, forming a β‐spiral assembly along the c axis.