Synthesis, Structure and Properties of Bridged and Unbridged Heterohelicenes
作者:Kazuhiko Tanaka、Yoshinori Kitahara
DOI:10.1080/10426509908546490
日期:1999.1
The structure of a bridged thiaheterohelicene has been determined by X-ray crystallographic method, showing that the helicene framework exhibits significant elasticity and acts as a molecular spring.
Enantiomeric helicenes of (P)-A and (M)-A were synthesized. The binding of the helicenes to B- and Z-DNA was studied quantitatively by CD, equilibrium dialysis, and fluorescence spectroscopy. Enantiomeric (P)-A not only bound selectively to Z-DNA but also effectively converted the B-DNA conformation to Z-DNA. The enantioselectivity of the helicenes offers a new route for the rational design of inhibitors of biological functions that may depend on Z-DNA.