Bolitt, Veronique published the artcileTriphenylphosphine hydrobromide: a mild and efficient catalyst for tetrahydropyranylation of tertiary alcohols, Category: tetrahydropyran, the publication is Tetrahedron Letters (1988), 29(36), 4583-6, database is CAplus.
PPh3.HBr is a convenient and highly effective catalyst for tetrahydropyranylation of tertiary alcs. with dihydropyran in CH2Cl2 at ambient temperature Thus EtMe2COH gave 92% tetrahydropyranyl ether.
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 C10H16O2, Category: tetrahydropyran.
Referemce:
https://en.wikipedia.org/wiki/Tetrahydropyran,
Tetrahydropyran – an overview | ScienceDirect Topics