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Phosphorus compounds with unusual coordination - 201. 1,2,3,4- triazaphospholes by [3+2]-cycloaddition of azides to a stable phosphaalkyne

✍ Scribed by Wolfgang Rösch; Thomas Facklam; Manfred Regitz

Book ID: 104205232
Publisher: Elsevier Science
Year: 1987
Tongue: French
Weight: 596 KB
Volume: 43
Category: Article
ISSN: 0040-4020
DOI: 10.1016/s0040-4020(01)90292-3

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✦ Synopsis

The asides 28-i undergo regiospecific [3+2]-cycloaddition with the phosphaalkynei to form the 1,2,3,4-triazaphospholes38-i; in the case of the reaction vith 2). an additional silyl shift occurs resulting in the formation of4j. The latter product can by hydrolyzed to 6 which has also been prepared independently from1 and hydratoic acid(T) . Flash vacuum pyrolyses of the 1.2,3.4-triazaphospholes 3C and% produce mixtures of the isomers13a,b and 14a,b,respectively, from which the 1,2-aza-phospholesl4 can be isolated as the major reaction products.

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