p,p-Dihydroxydihydrostilbenophanes Related to Antimitotic Combretastatins. Conformational Analysis and Its Relationship to Tubulin Inhibition
摘要:
The structures of a new family of macrocyclic analogues of combretastatins B combining oxygenated substituents on the phenyl rings and indole rings are described. The effects of the stereochemistry, of the length of the spacer linking both aryl groups, and of the decoration of the macrocycles on the kinematics of the system have been studied by means of NMR studies at several temperatures and in different solvents combined with theoretical studies including Monte Carlo conformational searches and molecular dynamics simulations at different temperatures. The new indole macrocycles provide a more rigid view of this kind of macrocycles than that previously held. The tubulin polymerization activity of this new class of macrocycles has been assayed and analyzed.
The synthesis of a new family of methoxy‐substituted [2.7]‐ and [2.8]paracyclophanes linked by 3‐oxapentamethylene‐1,5‐dioxy and hexamethylene‐1,6‐dioxy bridges has been carried out by using the McMurry methodology. Related indole compounds were also synthesised. Olefin‐to‐diol ratios depended on the bridge length, the structure of the aromatic ring and the reaction conditions. Macrocyclisation, the
<i>p</i>,<i>p</i>-Dihydroxydihydrostilbenophanes Related to Antimitotic Combretastatins. Conformational Analysis and Its Relationship to Tubulin Inhibition
The structures of a new family of macrocyclic analogues of combretastatins B combining oxygenated substituents on the phenyl rings and indole rings are described. The effects of the stereochemistry, of the length of the spacer linking both aryl groups, and of the decoration of the macrocycles on the kinematics of the system have been studied by means of NMR studies at several temperatures and in different solvents combined with theoretical studies including Monte Carlo conformational searches and molecular dynamics simulations at different temperatures. The new indole macrocycles provide a more rigid view of this kind of macrocycles than that previously held. The tubulin polymerization activity of this new class of macrocycles has been assayed and analyzed.