Pérez S, López C, Caubet A, Roig A, Molins E. Ring−Chain Tautomerism of the Novel 2-Ferrocenyl-2,4-dihydro-1H-3,1-benzoxazine.
J Org Chem 2005;
70:4857-60. [PMID:
15932330 DOI:
10.1021/jo050437v]
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Abstract
The synthesis and the study of the spectroscopic and electrochemical properties as well as the solution behavior of the novel 2-ferrocenyl-2,4-dihydro-1H-3,1-benzoxazine (1a) are described. NMR studies reveal the existence of a tautomeric equilibria between the cyclic (1a) and the open-chain form (2a). Electrochemical studies based on cyclic voltametry and 57Fe Mossbauer spectroscopy as well as a comparative study of the ring-chain tautomerism of 1a and that of 2-phenyl-2,4-dihydro-1H-3,1-benzoxazine (3a) are also reported.
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