A Practical Large-Scale Synthesis of Cyclic RGD Pentapeptides Suitable for Further Functionalization through ‘Click' Chemistry
作者:Andreas Kirschning、Jiří Paleček、Gerald Dräger
DOI:10.1055/s-0030-1258396
日期:2011.2
A multigram batch of the cyclo[Arg-Gly-Asp-d-Phe-Lys] and its N-ε-azido derivative was accomplished via solution-phase synthesisusing an epimerization-free fragment condensation. The C-terminus of d-Phe was protected as its tert-butyl ester. Fmoc (Arg, Gly, Asp, d-Phe) and Boc (Lys) groups were used to protect all N-α-termini. The Ts and NO2 groups, respectively were chosen to protect the guanidine