81287-15-2Relevant academic research and scientific papers
Reactions with Cyclobutenediones, LXI. Ring Expansions and Conversions of 3-Alkyl-4-phenylcyclobutenediones
Ried, Walter,Vogt, Manfred
, p. 783 - 790 (2007/10/02)
In a novel reaction for the cyclobutenedione system, oxidation of the title compounds 1a and 1b leads to ring expansion with formation of cyclopentenetrione 3 and cyclopentenedione 5.The oximes 6a and b, produced by nitrosation of 1a and b, can be hydrolysed to the ring enlarged structures 4d and 5. 4d is oxidized to 3 and methylated to 7.Beckmann-conversion of 6a and b results in the formation of the amide 10 and the amine 11. 6a is acetylated to 13 or dehydrated to the nitrile 14.
