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Photochemische Cycloadditionen von 3-Phenyl-2H-azirinen mit Triphenyl-vinylphosphoniumbromid. 36. Mitteilung über Photoreaktionen

✍ Scribed by Nikolas Gakis; Heinz Heimgartner; Hans Schmid

Publisher
John Wiley and Sons
Year
1974
Tongue
German
Weight
327 KB
Volume
57
Category
Article
ISSN
0018-019X

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✦ Synopsis

Abstract

On irradiation in acetonitrile 3‐phenyl‐2H‐azirines of type 1 react with triphenyl vinyl phosphonium bromide to form in approximative 50% yield 2H‐indoles of type 4 (Scheme 1). In analogy to other photochemical reactions with 2H‐azirines [2] [3] it is assumed that the photochemically generated dipoles 2 react with the triphenyl vinyl phosphonium salt (Scheme 1). The conversion of 1 to 4 represents a new synthesis for 2H‐pyrroles.

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