Reactions of triacetic acid lactone with carbonyl compounds. X-Ray structure determination of 3-acetoacetyl-2-chromenone and 3,6,9,12-tetramethyl-1H,6H,7H,12H-6,12-methanodipyrano[4,3-b:4,3-f]-dioxocin-1,7-dione |
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| Authors: | P De March M Moreno-Maas J L Roca G Germain J F Piniella O Dideberg |
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| Institution: | P. De March,M. Moreno-Mañas,J. L. Roca,G. Germain,J. F. Piniella,O. Dideberg |
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| Abstract: | The structure of 3-acetoacetyl-2-chromenone has been definitely assigned to the product resulting from the reaction of 4-hydroxy-6-methyl-2-pyrone, 1 , with 2-hydroxybenzaldehyde. Also, the reaction of the pyrone 1 with pentane-2,4-dione in a 2:1 molar ratio gives 3,6,9,12-tetramethyl-1H,6H,7H,12H-6,12-methanodypirano4,3-b:4,3-f]dioxocin-1,7-dione. X-Ray analyses of both products are presented. |
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