78329-07-4Relevant academic research and scientific papers
Synthesis and Rearrangements of 1,1'-Bi(benzocyclobutylidene) and its Derivatives
Barton, John W.,Shepherd, Michael K.
, p. 1561 - 1566 (2007/10/02)
Convenient new preparations of 1-halogeno-1,2-dihydrobenzocyclobutenes (5) and (6) and 1,1'-bi(benzocyclobutylidene) (4) are described.The hydrocarbon (4) is susceptible to cationic rearrangements: it forms 5,10-dihydroindenoindene (16) on protonation in acetic anhydride, and is oxidised by selenium(IV) oxide to a mixture of the spiroketone (17) and 5H-indeno-benzopyran-2-one (18).The mechanisms of these and other rearrangements are discussed.
