Synthesis and Conformational Dynamics of Tricyclic Pyridones Containing a Fused Seven-Membered Ring
作者:Karl R. Gibson、Laure Hitzel、Russell J. Mortishire-Smith、Ute Gerhard、Richard A. Jelley、Austin J. Reeve、Michael Rowley、Alan Nadin、Andrew P. Owens
DOI:10.1021/jo026411a
日期:2002.12.1
A new synthetic approach to tricyclic pyridones bearing a fused seven-memberedring is described. These compounds exhibit atropisomerism and exist in enantiomeric forms. Chiral HPLC separation of the enantiomers has allowed the rates of racemization to be measured and hence the free energy barrier for flipping the seven-memberedring to be deduced. Introduction of a further element of planar chirality