72409-69-9Relevant academic research and scientific papers
A novel type rearrangement in cyclic β-dicarbonyl compounds in strong acid media
Saito, Kimitoshi,Yuki, Hidetaka,Ohyama, Toshiyuki,Nakane, Ryohei,Nagumo, Katsuyuki,Sato, Tadashi
, p. 1717 - 1721 (2007/10/02)
5,5-Dimethylcyclohexane-1,3-dione and its derivatives were shown to isomerize to give 5,6-dihydropyran-4-ones on irradiation in FSO3H or 98 percent H2SO4.The 2,2-dimethyl derivative, lacking hydrogen on C2, failed to give any products under the same conditions.A similar type of isomerization was also observed with thiolane-2,4-dione and its derivatives, while no photoisomerization was observed with their nitrogen or oxygen analogs.A possible reaction mechanism is proposed.
