Tetrahedron p. 13671 - 13680 (1996)
Update date:2022-07-30
Topics:
Molina, Pedro
Aller, Enrique
Lorenzo, Angeles
Foces-Foces, Concepcion
Llamas Saiz, Antonio L.
An anomalous intramolecular conjugate addition of N-SEM protected imidazoles to vinyliminophosphoranes proceeds efficiently in the presence of tetrabutylammonium fluoride (TBAF) to afford the corresponding fused imidazoles. The crystal and molecular structure of 4 have been solved by X-ray analysis. The crystal packing is governed by weak C-H···X (X = O, N or aromatic π system) hydrogen interactions because of the absence of more polarized donor groups to form hydrogen bonds.
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Doi:10.1021/ic9605837
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