A Rh(I)-catalyzed cycloisomerization reaction affording cyclic trienones was written by Brummond, Kay M.;Chen, Daitao;Painter, Thomas O.;Mao, Shuli;Seifried, Darla D.. And the article was included in Synlett in 2008.Quality Control of 2-(But-3-yn-1-yloxy)tetrahydro-2H-pyran This article mentions the following:
A Rh(I)-catalyzed carbocyclization reaction of allene-ynones affords functionalized 2-alkylidene-3-vinylcyclohexenones and -cyclopentenones. The scope, limitations, and utility of this triene-forming protocol were examined In the experiment, the researchers used many compounds, for example, 2-(But-3-yn-1-yloxy)tetrahydro-2H-pyran (cas: 40365-61-5Quality Control of 2-(But-3-yn-1-yloxy)tetrahydro-2H-pyran).
2-(But-3-yn-1-yloxy)tetrahydro-2H-pyran (cas: 40365-61-5) belongs to tetrahydropyran derivatives. Tetrahydropyran is a useful synthetic intermediate. Tetrahydropyranyl (THP-) ethers derived from the reaction of alcohols and dihydropyran are common intermediates in organic synthesis. The reaction of tertiary 1,4- and 1,5-diols with cerium ammonium nitrate at room temperature gives tetrahydrofuran and tetrahydropyran derivatives in high yield and stereoselectivity. Various fragrant compounds have been synthesized using this method.Quality Control of 2-(But-3-yn-1-yloxy)tetrahydro-2H-pyran
Referemce:
Tetrahydropyran – Wikipedia,
Tetrahydropyran – an overview | ScienceDirect Topics