The Action of Alkaline Reagents on Diphenylbenzoylbutyrolactone

Chemistry of Cyclopentadienones

“…Thus, the condensation of . A. Ogliaruso, M. G. Romanelli, and E. I. Becker benzyl ketone and ethyl phenylglyoxylate with sodium methoxide or the rearrangement and dehydration of 2-oxo-3,4-diphenyl-5-benzoyltetrahydrofuran yields 2,3,5-triphenyl-2-cyclopentene-l,4-dione (CXXXI), the ketonic and stable form of the cyclopentadienone, 2,3,5triphenyl-4-hydroxycyclopentadienone (CXXXII) (28).…”

The Thermal Reversibility of the Michael Reaction: Iii. 1,5-Diketones and Adducts Bearing Acidic Groups

“…Its a-bromo derivative (XIII) also gave predominantly the ester (XII). I t is noteworthy that there was no evidence for the formation of a lactone (XIV) through loss of methyl bromide, a type of reaction that is so easily brought about in the laboratory (12). (14) is stated to distill with decomposition a t atmospheric pressure; we have found that the loss is a very small carbonaceous residue.…”

THE REACTIONS AND ENOLIZATION OF CYCLIC DIKETONES. VI. 2,4,5-TRIPHENYLCYCLOPENTENE-4-DIONE-1,3 AND 2,4,5-TRIPHENYLCYCLOPENTANEDIONE-1,31

“…Abstracted from a thesis presented by S. Wawzonek in partial fulfillment of the requirements for the Ph.D. degree, July, 1939.2 A paper describing the diketone and a different method for its preparation was published by Allen, Massey, and Nicholls(2) after the present research had been completed.…”