2,2-dimethyl-5-phenylacetyl-1,3-dioxane-4,6-dione
pale-yellow prisms, mp 96–97°C The 1H NMR spectrum of this compound has absorptions at δ 1.65 (s, 6 H), 4.30 (s, 2 H), 7.20 (s, 5 H), and 15.0 (br s, 1 H).
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Showing posts with label 3-dioxane-4. Show all posts
Showing posts with label 3-dioxane-4. Show all posts
Monday, 25 January 2016
2,2-dimethyl-5-phenylacetyl-1,3-dioxane-4,6- dione/phenylacetyl-Meldrum’s acid
2,2-dimethyl-5-phenylacetyl-1,3-dioxane-4,6-dione
pale-yellow prisms, mp 96–97°C The 1H NMR spectrum of this compound has absorptions at δ 1.65 (s, 6 H), 4.30 (s, 2 H), 7.20 (s, 5 H), and 15.0 (br s, 1 H).
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Sunday, 24 January 2016
2,2-dimethyl-5-acetyl- 1,3-dioxane-4,6-dione/Acetyl-Meldrum’s acid
The product has an Rf of 0.22 in 5% methanol/methylene chloride (silica gel) and displays the following spectral data: 1H NMR (300 MHz, CDCl3) δ: 1.71 (s, 6 H), 2.64 (s, 3 H) ; 13C (75 MHz, CDCl3) δ: 37.5, 42.4, 45.1, 106.2, 118.6, 174.8, 184.2, 207.5 . The acidic proton was not observed in the 1H NMR spectrum.
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