Kurdyukov, V. V. et al. published their research in Dopovidi Natsional’noi Akademii Nauk Ukraini in 2017 | CAS: 13417-49-7

5,6-Dihydro-2H-pyran-3-carbaldehyde (cas: 13417-49-7) 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 Prins reaction of homoallylic alcohols with aldehydes afforded an alternative method for the preparation of tetrahydropyrans.Application of 13417-49-7

Polymethine dyes based on pyrylium salts with unsaturated cyclic groups in the 4-position was written by Kurdyukov, V. V.;Tolmachev, A. I.. And the article was included in Dopovidi Natsional’noi Akademii Nauk Ukraini in 2017.Application of 13417-49-7 This article mentions the following:

2,6-Diphenyl-substituted pyrylium salts containing unsaturated cyclic groups are synthesized. They are shown to be feasible precursors for the synthesis of sym. and unsym. dyes. The spectral properties of synthesized dyes are studied in solvents of different polarities. In the experiment, the researchers used many compounds, for example, 5,6-Dihydro-2H-pyran-3-carbaldehyde (cas: 13417-49-7Application of 13417-49-7).

5,6-Dihydro-2H-pyran-3-carbaldehyde (cas: 13417-49-7) 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 Prins reaction of homoallylic alcohols with aldehydes afforded an alternative method for the preparation of tetrahydropyrans.Application of 13417-49-7

Referemce:
Tetrahydropyran – Wikipedia,
Tetrahydropyran – an overview | ScienceDirect Topics