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Towards the Synthesis of o ‐Diphosphaquinones: Benzodiphosphadihydropentalene – Naphthodihydrodiphosphete
Author(s) -
Märkl Gottfried,
Hennig Rüdiger,
Nöth Heinrich
Publication year - 1996
Publication title -
liebigs annalen
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.825
H-Index - 155
eISSN - 1099-0690
pISSN - 0947-3440
DOI - 10.1002/jlac.199719970118
Subject(s) - chemistry , isomerization , valence (chemistry) , nitrogen , organic synthesis , medicinal chemistry , stereochemistry , organic chemistry , catalysis
o ‐Quinodimethanes 1 are important intermediates in organic synthesis that may be generated by thermal valence isomerization of benzocyclobutenes [1] or octa‐1,2,4,6,7‐pentaenes [2] . 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 [3] , o ‐diphosphaquinones 3 have not been detected.