Torii, Sigeru published the artcileSyntheses of chromones and quinolones via palladium-catalyzed carbonylation of o-iodophenols and anilines in the presence of acetylenes, Synthetic Route of 27943-46-0, the publication is Tetrahedron (1993), 49(31), 6773-84, database is CAplus.
Synthesis of 2-substituted chromones and quinolones has been performed by a Pd-catalyzed carbonylation of o-iodophenols or o-iodoanilines in the presence of terminal acetylenes in a high yield through coupling of halides and acetylenes followed by cyclization as a one-pot reaction.
Tetrahedron 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 C12H20O6, Synthetic Route of 27943-46-0.
Referemce:
https://en.wikipedia.org/wiki/Tetrahydropyran,
Tetrahydropyran – an overview | ScienceDirect Topics