Novel 1,2,4-Triphosphole, 1,2,3-Triphosphetene and Azaphospholene Derivatives from N -Heterocyclic Carbenes and Phosphaalkynes |
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| Authors: | F. E. Hahn D. Le Van L. Wittenbecher M. C. Moyes T. Von Fehren R. Fröhlich |
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| Affiliation: | 1. Anorganisch-Chemisches Institut der Universit?t , Wilhelm-Klemm-Strasse 8, Münster , 48149 , Germany;2. Organisch-Chemisches Institut der Universit?t , Corrensstrasse 40, Münster , 48149 , Germany |
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| Abstract: | The stable singlet carbenes N,N '-bis(2,2-dimethylpropyl)-benzimidazolin-2-ylidene 1 and 1,3,4,5-tetramethylimidazol-2-ylidene 2 react with phosphaalkynes P L C-- t Bu ( 3a ) or P L C--N i Pr 2 ( 3b ) regioselective to give the aromatic 1,2,4-triphosphole derivatives ( 1 or 2 + 3a M 6a or 6b , respectively) or 1,2,3-triphosphetene ( 1 + 3b M 7 ) or azaphospholene ( 2 + 3b M 9 ) in almost quantitative yields. The mechanisms of the surprising formation of compound 9 under C--H-activation was studied by quantum chemical DFT calculations. |
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| Keywords: | Carbenes Phosphaalkynes Phosphorus Heterocycles |
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