Tetrahedron Letters p. 7255 - 7258 (1997)
Update date:2022-08-11
Topics:
Sarobe, Martin
Jenneskens, Leonardus W.
Kleij, Arjan
Petroutsa, Maria
The formation of cyclopenta[cd]pyrene (5) and benzo[ghi]fluoranthene (6) upon FVT of 3,9-bisethynylphenanthrene (1) and 8-ethynylfluoranthene (2), respectively, suggests that redundant ethynyl substituents, which cannot give five- and/or six-membered ring formation via ethynyl ethylidene carbene equilibration followed by carbene C-H insertion, can migrate along the PAH periphery at high temperatures.
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