Coordinatively unsaturated ruthenium allenylidene complexes: highly effective, well defined catalysts for the ring-closure metathesis of α,ω-dienes and dienynes
A most user-friendly protocol for ring closing metathesis reactions
作者:Alois Fürstner、Lutz Ackermann
DOI:10.1039/a808810a
日期:——
Ring closing metathesis reactions (RCM) can be conveniently achieved in a photo-assisted manner simply by heating a solution of the diene substrate, catalytic amounts of commercially available [(p-cymene)RuCl2]2 4 and PCy3 in CH2Cl2 under neon light.
Coordinatively unsaturated ruthenium allenylidene complexes: highly effective, well defined catalysts for the ring-closure metathesis of α,ω-dienes and dienynes
作者:Alois Fürstner、Monika Liebl、Anthony F. Hill、James D. E. T. Wilton-Ely
DOI:10.1039/a900187e
日期:——
The well defined, conveniently accessible and coordinatively unsaturated allenylidene complexes [RuCl2(CC CPh2)(PCy3)2] and [Ru2Cl4(CCCPh2)(PCy3)(η-MeC6-H4Pri-4)] are highly effective catalysts for the ambient temperature ring-closure metathesis of α,Ï-dienes and dienynes, illustrated by the facile and high yielding formation of variously functionalised 5, 6, 7, 8, 15, 16 and 18 membered mono- and bi-cyclic ring systems.