Wiley InterScience Backfile Collection 1832-2000
Chemistry and Pharmacology
o-Quinodimethanes 1 are important intermediates in organic synthesis that may be generated by thermal valence isomerization of benzocyclobutenes or octa-1,2,4,6,7-pentaenes. The preparation of a stable o-quinodimethane has not been reported so far. Whereas o-quinodiimines 2 containing strongly electron-withdrawing groups at the nitrogen atoms are isolable, o-diphosphaquinones 3 have not been detected.
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