Lyngbyastatin 1 and Ibu-epilyngbyastatin 1: Synthesis, Stereochemistry, and NMR Line Broadening
作者:Ruoli Bai、Robert B. Bates、Ernest Hamel、Richard E. Moore、Pichaya Nakkiew、George R. Pettit、Bilal A. Sufi
DOI:10.1021/np020117w
日期:2002.12.1
lyngbyastatin 1-Ibu-epilyngbyastatin 1 mixture combined with NMR and molecular modeling studies proved that natural lyngbyastatin 1 was only one Ibu epimer rather than a mixture of both and that the configuration of this epimer in the Ibu unit was R. The substance isolated with lyngbyastatin 1 was Ibu-epidolastatin 12. The extreme broadness in the proton NMR spectra of lyngbyastatin 1 and Ibu-epidolastatin 12