The Preparation and Properties of 1,2-Bis (triphenylphosphoranyl) benzocyclobutene

Alfred T. Blomquist, Victor J. Hruby

Research output: Contribution to journalArticlepeer-review

21 Scopus citations


The preparation of trans-1,2-bis(triphenylphosphonio)benzocyclobutene dibromide and its conversion to 1,2-bis(triphenylphosphoranyl)benzocyclobutene are described. Treatment of the dibromide salt with base followed by reaction with a benzaldehyde affords different results that depend upon the nature of the solvent. In ethanol as the major solvent, the principal products are the cis- and trans-1-benzylidenebenzocyclobutenes corresponding to the particular benzaldehyde used, together with triphenylphosphine oxide; in DMF or DMSO, the major products are the cis,cis- and/or cis,trans- and/or trans,trans-1,2-bisbenzylidenebenzocyclobutenes corresponding to the benzaldehydes used, as well as triphenylphosphine oxide. In both instances a number of minor products are obtained. The structure and stereochemistry of the major products are in accord with the chemical and physical data reported herein.

Original languageEnglish (US)
Pages (from-to)4996-5007
Number of pages12
JournalJournal of the American Chemical Society
Issue number19
StatePublished - Sep 1 1967
Externally publishedYes

ASJC Scopus subject areas

  • Catalysis
  • General Chemistry
  • Biochemistry
  • Colloid and Surface Chemistry


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