Scott, Lawrence T. published the artcileCyclynes. Synthesis and characterization of octamethylcyclododeca-1,3,7,9-tetrayne, Name: 2-((2-Methylbut-3-yn-2-yl)oxy)tetrahydro-2H-pyran, the publication is Tetrahedron Letters (1976), 2663-6, database is CAplus.
Deprotonation of Me2C(OR)CCH (R = Ac, tetrahydropyranyl) with BuLi and decomposition of resulting anion with CuCl gave low yields of the tetrayne I. The uv, ir, Raman, photoelectron, and NMR spectra for I are reported. I was formed by Cu+-catalyzed formation of the cumulene Me2C:C:C:C:C:CMe2 (II) which dimerized. II was isolated if the reaction was stopped before completion.
Tetrahedron Letters 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 C12H17NS2, Name: 2-((2-Methylbut-3-yn-2-yl)oxy)tetrahydro-2H-pyran.
Referemce:
https://en.wikipedia.org/wiki/Tetrahydropyran,
Tetrahydropyran – an overview | ScienceDirect Topics