21086-24-8Relevant academic research and scientific papers
Thioketyls, 10. The 2,4-Bis(diphenylmethylene)-1,3-cyclobutane-dione Diradical Dianion and its Sulphur Analogues
Srehlow, Thomas,Voss, Juergen,Spohnholz, Ruediger,Adiwidjaja, Gunadi
, p. 1397 - 1402 (2007/10/02)
2,4-Bis(diphenylmethylene)-1,3-cyclobutanedione (1) is transformed into its sulphur analogues 2 and 3 with Lawesson's or Davy's reagent 5a,b.An X-ray structural analysis is performed on 3.The electrochemistry of these compounds is surveyed.The products of
A new procedure for the in situ generation of methylene ketenes
Masters, Andrew P.,Sorensen, Ted S.,Tran, Phu Mahn
, p. 1499 - 1502 (2007/10/02)
The reaction of pentacarbonylmanganate anion 3 and 2-bromopropenoyl chlorides 2 leads to 2,4-alkylidenecyclobutane-1,3-diones 5.The latter are formed from dimerization of the corresponding methylene ketenes 1 so that the reaction of 2 and 3 constitutes a
Ketene. Part 24. The Reactions of N-(Fluoren-9-ylidene)methylamine N-Oxide with Dimethylketene and Ketene
Gettins, Anthony F.,Hashi,Nur A.,Stokes, David P.,Taylor, Giles A.,Wyse, Kevin J.
, p. 2501 - 2504 (2007/10/02)
The principal products of the reaction of the N-methylnitrone (1a) with dimethylketene have been identified as the dioxolane derivative (6) and its hydrolysis products (7).Fluoren-9-yl isocyanide appears to be an intermediate in this reaction.Ketene reacts with nitrone (1a) and its N-ethyl and N-isopropyl analogues to give the cyclobutanedione (15) as the only isolated product.Compound (15) has been synthesized from fluoren-9-ylidenemalonic acid.
