Tetrahedron p. 2503 - 2512 (1985)
Update date:2022-09-26
Topics:
Alemagna, A.
Buttero, P. Del
Licandro, E.
Papagni, A.
Ballabio, M.
The title reactions begin with the attack on the aldonitronyl group by the nitrogen atom α to the ylidic carbon, to give, presumably, a cyclic species, which splits off a nitroso compound to afford indazolyl-2-methylenetriphenylphosphorane.In one case the primarily formed cyclic species underwent a further intra molecular cyclization to imidazo<1,2-b>indazole.
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