22502-49-4Relevant academic research and scientific papers
Multistep Reversible Redox Systems. 48. 1,3-Bisquinone Methide Cyclobutanes and Related Bicyclobutanes: Syntheses and Redox Properties
Freund, Wolfgang,Huenig, Siegfried
, p. 2154 - 2161 (2007/10/02)
A new approach to quinone methides is presented, which starts from diazides and thioketones.Together with some model compounds, 1,3-bisquinone methide cyclobutanes 23, 25, and 37 were synthesized.Reduction with sodium transforms these quinoid compounds in
Strain-Assisted α-Cleavage Reactions of Thioketones: Cyclobutanethiones
Muthuramu, K.,Sundari, B.,Ramamurthy, V.
, p. 4482 - 4487 (2007/10/02)
Photochemical α-cleavage from the lowest triplet state (n?*,T1), resulting in the generation of a diradical intermediate, appears to be general for cyclobutanethiones.The diradical intermediate derived from 1,3-dithione is observed to undergo ring expansion to carbene or close to either dithione or dithiolactone.The photochemical behavior reported here for cyclobutanethiones is different from that of the corresponding cyclobutanones. α-Cleavage processes in the case of cyclobutanethiones are not efficient and are often accompanied by side reactions.
