Reaction of 2,6-Bis(4-azidobenzyIidene)-4-methyl-cyclohexanone with Organophosphorus Reagents. Synthesis of Some Benzylidene-1, 2, 3-triazole Derivatives

摘要

TRIPHENYLPHOSPHINE (1) reacts with 2,6-bis(4-azido-benzylidene)-4-raethylcyclohexanone (4) to give the respective triphenylphosphinylidenetriaz-1-enyl (5a) and triphenylphosphinylidene-amino (5b). Moreover, reaction of aryl azide (4) with trisdimethy-laminophosphine (2) in refluxing toluene afforded the new products (6a, b). On the other hand, phosphorus ylides (3a-d) react with azidobenz-ylidene (4) to give the corresponding l,5-disubstituted-l,2,3-triazoles (7a-d) and triphenylphosphine oxide. Possible reaction mechanisms are considered and the structural assignments are based on compatible analytical and spectroscopic results.