Kimura, Masanari published the artcileSilver(I)-catalyzed aminocyclization of 2,3-butadienyl and 3,4-pentadienyl carbamates: an efficient and stereoselective synthesis of 4-vinyl-2-oxazolidinones and 4-vinyltetrahydro-2H-1,3-oxazin-2-ones, Quality Control of 27943-46-0, the publication is Bulletin of the Chemical Society of Japan (1995), 68(6), 1689-705, database is CAplus.
Silver(I) salts in combination with an appropriate base (mostly triethylamine) catalyzed the aminocyclization of N-substituted 2,3-butadienyl carbamates I (benzene, 50°) to provide 4-vinyl-2-oxazolidinones II in good yields. The stereoselectivity (trans-II/cis-II) ranged from 1.4 for C5-Me to >30 for C5-Ph, isopropenyl, and t-Bu derivatives 3,4-Pentadienyl tosylcarbamates III, the one-carbon higher homologues of I, underwent a similar cyclization to give 4-vinyltetrahydro-2H-1,3-oxazin-2-one IV in synthetically useful yields and in higher trans selectivities than I.
Bulletin of the Chemical Society of Japan 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, Quality Control of 27943-46-0.
Referemce:
https://en.wikipedia.org/wiki/Tetrahydropyran,
Tetrahydropyran – an overview | ScienceDirect Topics