RUTHENIUM-CATALYZED REGIOSELECTIVE COPOLYMERIZATION OF ANTHRONE, FLUORENONE, OR XANTHONE WITH ALPHA, OMEGA-DIENES

This paper reports a novel ruthenium catalyzed regioselective copolyme rization reaction between anthrone, fluorenone or xanthone and alpha,o mega-dienes such as 1,3-divinyltetramethyldisiloxane and 3,3,6,6-tetra methyl-3,6-disila-1,7-octadiene. This reaction involves the ruthenium catalyzed regioselective Anti-Markovnikov insertion of the carbon-carb on double bonds of the alpha,omega-dienes into the aromatic carbon-hyd rogen bonds which are ortho to the carbonyl group of anthrone, fluoren one or xanthone. Similar ruthenium catalyzed copolymerization reaction s between acetophenone and alpha,omega-dienes [1] have been recently r eported as have reactions between acetophenone and alkenes to yield mo nomeric ortho-alkyl substituted acetophenones [2].