Total synthesis of nominal cyclocinamide B and investigation into the identity of the cyclocinamides
作者:Stephanie S. Curzon、Jessica M. Garcia、Joseph P. Konopelski
DOI:10.1016/j.tetlet.2014.09.087
日期:2015.6
The totalsynthesis of nominal cyclocinamide B, a cyclic peptide marine natural product, is reported together with an isomer of nominal cyclocinamide A. Initial attempts at the synthesis of the title compounds by inclusion of a turn inducer failed. However, a direct synthesis succeeded in the formation of the 14-membered cyclic peptide structure. A comparison of the data from all synthetic cyclocinamide
Application of the DP4 Probability Method to Flexible Cyclic Peptides with Multiple Independent Stereocenters: The True Structure of Cyclocinamide A
作者:Jason K. Cooper、Kelin Li、Jeffrey Aubé、David A. Coppage、Joseph P. Konopelski
DOI:10.1021/acs.orglett.8b01756
日期:2018.7.20
A DP4 protocol has been successfully utilized to establish the true structure of the natural product cyclocinamide A, a flexible cyclic peptide with four isolated stereocenters. Benchmarking the necessary level of theory required to successfully predict the NMR spectra of three previously synthesized isomers of cyclocinamide A led to the prediction of the natural stereochemistry as 4S, 7R, 11R, 14S, which has been confirmed by total synthesis.