Hydrogenation of 9-pyridylmethylene- and 9-benzylidene(aza)fluorenes in the presence of rhenium heptasuifide
摘要:
Hydrogenation of 9-pyridylmethylene(aza)fluorenes and 9-benzylidene-4-azafluorene at 250 degrees C and p(H2) = 130 atm in the presence of Re2S7 as a catalyst occurs preferably at the exocyclic double bond of the fulvene fragment to yield pyridyl-9-(aza)fluorenylmethanes.