Summary.
Methacrylic acid-d5 was prepared in a yield of 30% with 98.6% deuterium incorporation using a two step synthesis. A solution of acetone-d6 and KCN in D2O was treated with glacial acetic acid to give the cyanohydrin of acetone-d6. The latter compound was then dehydrated in anhydrous sulfuric acid at 120°C and subsequently hydrolysed in water at 90°C to form methacrylic acid-d5. Hydrolysis of commercial nonaethyleneglycol dimethacrylate gave a mixture of ethylene glycols. These glycols were combined with methacrylic acid-d5 in the presence of p-TsOH in benzene to form nonaethyleneglycol dimethacrylate-d10 with ∼21% deuterium incorporation. Deuterated bisGMA was also prepared from methacrylic acid-d5 and diglycidyl ether of bisphenol-A.
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Note that DGEBA contains oligomers raising its molecular weight to 380 g/mol. The average structure of DGEBA is given as in Scheme 2
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Present address: Boron Molecular Pty Ltd, PO Box 756, Noble Park, VIC 3174, Australia
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Moorhoff, C., Cook, W. Partial Deuterium Labeling of Dimethacrylate Monomers. Monatsh. Chem. 137, 449–454 (2006). https://doi.org/10.1007/s00706-005-0453-1
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DOI: https://doi.org/10.1007/s00706-005-0453-1