On the Stacking of ? -Rings: The solution self-association behavior of two partiallyN-methylated cyclo(hexaleucines)
作者:Xicheng Sun、Gian Paolo Lorenzi
DOI:10.1002/hlca.19940770607
日期:1994.9.21
Cyclo(-D-Leu-L-MeLeu-D-Leu-L-MeLeu-D-Leu-L-MeLeu-) (1) and cyclo(-L-Leu-D-Leu-L-MeLeu-D-Leu-L-Leu-D-Leu-) (2) were synthesized and used for a study of the interaction of β -rings in solution. In appropriate solvents, 1 and 2 formed dimers consisting of two β -rings connected through six interannular H-bonds and having the N -Me group(s) on the solvent-exposed face. The study also afforded indications