Reactions of unactivated olefins with Vilsmeier reagents
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X Ray
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Reactions of N-formylmorpholine/POCl3 with several unactivated olefins yield the corresponding α,β-unsaturated aldehydes. Norbornene affords with dimethylformamide/POCl3 a product formed by a novel inverse-electron demand Diels–Alder reaction of an acyclic 2-azoniodiene. The structure of this product was confirmed by X-ray analysis. Crystals are monoclinic: a = 8.025(3), b = 11.670(3), c = 9.309(4) Å, β = 108.03(3)°, P21, Z = 2; the structure was refined to R = 0.044 for 1379 independent observed reflections.
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2009 ◽
Vol 48
(30)
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pp. 5474-5477
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1998 ◽
Vol 37
(17)
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pp. 2404-2406
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2002 ◽
Vol 113
(1)
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pp. 133-137
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