No as far as I am aware. The work of Otto Hahn and Lise Meitner in 1938 determined that Uranium was about the breaking point of stable atoms.
Hahn was particularly clueless, or lacking insight, so he relied very heavily upon Meitner to figure out matters which baffled him. So much so, that when she being Jewish fled to Stockholm and Hahn continued their experiments and quizzed her by air mail. There was a particularly fast overnight mail service throughout the war. British MI5 capitalised on this relationship to learn through hahn about Nazi nuclear progress.
Back to the topic, Meitner theorised to Hahn that an atom was like a water droplet where if one kept adding to the nucleus at some point it would get too big and begin to wobble and finally burst. She said this bursting was like losing surface tension.
As it burst of course it would form two smaller droplets so if this reasoning is correct then there seems little opportunity for heavy fusion.
Stars are the primary example of a fusion reaction. As stars burn up Hydrogen and start to consume Helium, the heat released appears to dwindle. I can only add that there don't seem to be any stars observed burning Uranium in fusion reactions.