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Syntheses of 3-Heteroaryl-2H-Azaphosphirene Tungsten Complexes

✍ Scribed by Rainer Streubel; Siegfried Priemer; Frank Ruthe; Peter G. Jones; Dietrich Gudat

Publisher: John Wiley and Sons
Year: 1998
Tongue: English
Weight: 412 KB
Volume: 1998
Category: Article
ISSN: 1434-1948
DOI: 10.1002/(sici)1099-0682(199805)1998:5<575::aid-ejic575>3.0.co;2-u

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✦ Synopsis

The syntheses of 3-heteroaryl-substituted 2H-azaphosphirene pentacarbonyltungsten complexes are reported. The products were characterized by multinuclear NMR spectro-2H-azaphosphirene tungsten complexes (I) are of current synthetic interest because of their widespread applicability in heterocycle synthesis. For example, we very recently demonstrated that 2H-azaphosphirene tungsten complexes provide a new access to five-membered heterocyclic complexes, through trapping reactions of transiently formed nitrilium phosphane ylide tungsten complexes (II) with an acetylene and a nitrile derivative. Therefore, we were interested in the synthesis of 3-heteroaryl-substituted 2Hazaphosphirene tungsten complexes. We also wished to test the limits of our initial synthetic approach to 2H-azaphosphirene complexes.

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