Schneiders, Gail E. published the artcileSynthesis of benzofurans by the action of copper on terminal alkynes and o-halophenols, Application In Synthesis of 27943-46-0, the publication is Synthetic Communications (1980), 10(9), 699-705, database is CAplus.
Dehydrotremetone (I) was prepared by cyclization of 3,4-I(HO)C6H3Ac with HCCCMe:CH2 in refluxing DMF containing K2CO3 and activated Cu powder. (Hydroxyisopropyl)benzofuran II, isolated previously from Podachaenium eminens, was similarly prepared from the tetrahydropyranyl ether III.
Synthetic Communications published new progress about 27943-46-0. 27943-46-0 belongs to tetrahydropyran, auxiliary class Tetrahydropyran,Alkynyl,Ether, name is 2-((2-Methylbut-3-yn-2-yl)oxy)tetrahydro-2H-pyran, and the molecular formula is C10H16O2, Application In Synthesis of 27943-46-0.
Referemce:
https://en.wikipedia.org/wiki/Tetrahydropyran,
Tetrahydropyran – an overview | ScienceDirect Topics