Harek, Y. et al. published their research in International Journal of Chemistry in 1992 | CAS: 13417-49-7

5,6-Dihydro-2H-pyran-3-carbaldehyde (cas: 13417-49-7) belongs to tetrahydropyran derivatives. Dihydropyrans and tetrahydropyrans are examples of cyclic ethers widespread in nature. 2-(Arylmethylene)cyclopropylcarbinols could be converted to the corresponding tetrahydropyrans stereoselectively in the presence of Brønsted acids under mild conditions. A plausible Prins-type reaction mechanism has been proposed.COA of Formula: C6H8O2

Spectroscopic and mechanistic studies of dioxouranium(VI) complexes derived from semi- and thiosemicarbazone ligands was written by Harek, Y.;Maki, A. K. T.;Mostafa, M. M.. And the article was included in International Journal of Chemistry in 1992.COA of Formula: C6H8O2 This article mentions the following:

The reaction between uranyl acetate dihydrate and some thiosemicarbazones in EtOH and/or in solid state is reported. The corresponding uranyl(VI) complexes with some semicarbazones were synthesized for the comparison between the effect of the carbonyl and thiocarbonyl groups towards the uranyl ion. All the complexes are characterized by elemental analyses, molar conductivities, spectra (IR, UV, NMR) and magnetic measurements. Also, mechanistic studies for the complexes with thiosemicarbazones in EtOH are explored. Also, the reaction of hard acid (UO22+) ion and the soft base as in case of thiosemicarbazone derivatives in the solid state is illustrated. In the experiment, the researchers used many compounds, for example, 5,6-Dihydro-2H-pyran-3-carbaldehyde (cas: 13417-49-7COA of Formula: C6H8O2).

5,6-Dihydro-2H-pyran-3-carbaldehyde (cas: 13417-49-7) belongs to tetrahydropyran derivatives. Dihydropyrans and tetrahydropyrans are examples of cyclic ethers widespread in nature. 2-(Arylmethylene)cyclopropylcarbinols could be converted to the corresponding tetrahydropyrans stereoselectively in the presence of Brønsted acids under mild conditions. A plausible Prins-type reaction mechanism has been proposed.COA of Formula: C6H8O2

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