Scott, Lawrence T. published the artcileThermal migration of an ethynyl group from one benzene ring to another by reversible vinylidene C-H insertion, Recommanded Product: 9,10-Diethynylanthracene, the publication is Tetrahedron Letters (1997), 38(11), 1877-1880, database is CAplus.
Evidence is presented for the high temperature opening of a 5-membered ring by extrusion of a carbene (the reverse of a C-H bond insertion), which results in the net thermal migration of an ethynyl group from one benzene ring to another.
Tetrahedron Letters published new progress about 18512-55-5. 18512-55-5 belongs to naphthyridine, auxiliary class Alkynyl,Anthracene, name is 9,10-Diethynylanthracene, and the molecular formula is C14H15BF3NO2, Recommanded Product: 9,10-Diethynylanthracene.
Referemce:
https://en.wikipedia.org/wiki/1,8-Naphthyridine,
1,8-Naphthyridine | C8H6N2 – PubChem