78926-35-9Relevant academic research and scientific papers
FORMATION OF SUBSTITUTED BENZOCYCLOBUTENES THROUGH FLASH VACUUM PYROLYSIS
Schiess, Peter,Rutschmann, Suzanne,Toan, Van Vien
, p. 3669 - 3672 (2007/10/02)
Benzocyclobutenes carrying a substituent in the four membered ring are obtained in high yield from 2-methyl benzaldehydes through a reaction sequence involving a pyrolitic 1,4-elimination of HCl in the crucial step.
APPROACHES TO PSEUDOINDENE. PRODUCTS DERIVED FROM THE CARBENES BENZOCYCLOBUTENE-1-YLCARBENE, 2-METHYLBENZOCYCLOBUTENYLIDENE AND o-STYRYLCARBENE
O'Leary, Margaret A.,Wege, Dieter
, p. 801 - 811 (2007/10/02)
The title carbenes, which in principle can all serve as precursors to the reactive hydrocarbon pseudoindene, have been generated by the photolysis of the sodium salts of the tosylhydrazones of (a) benzocyclobutene-1-carboxaldehyde, (b) 2-methylbenzocyclobutenone and (c) o-formylstyrene.Indene was formed in reactions (a) and (c): in the former case deuterium labelling experiments suggest a ring expansion mechanism rather than a pseudoindene intermediate.In the letter case deuterium labelling and trapping experiments implicate a symmetrical isoindene intermediate, which can arise either via pseudoindene, or via direct electrocyclic ring closure o-styrylcarbene.
