A stable enol in small ring systems: clear differentiation between penta- and tri-valency of phosphorus atoms |
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Authors: | Ionkin Alex S Marshall William J Fish Brian M Schiffhauer Matthew F McEwen Charles N |
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Institution: | DuPont Central Research & Development, Experimental Station, Wilmington, DE 19880-500, USA. alex.s.ionkin@usa.dupont.com |
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Abstract: | The first stable enols in 1,2-dihydrophosphetes and were synthesized and structurally characterized with intermolecular hydrogen bonds to phosphoryl groups in 10-membered dimeric structures; in contrast, trivalent analogue exists in keto-form, where such stabilization by hydrogen bonds is not feasible. |
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