๐”– Bobbio Scriptorium
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Oxidative methylation of 5-benzylidenebarbituric acids with argentic oxide

โœ Scribed by J.C. Ethier; G.A. Neville

Publisher
Elsevier Science
Year
1972
Tongue
French
Weight
211 KB
Volume
13
Category
Article
ISSN
0040-4039

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โœฆ Synopsis

In the course of applying several methylation procedures as an aid in the characterization, differentiation and fine structural studies of variously substituted barbiturates (l), great difficulty was experienced while attempting to methylate 5-vanillylidenebarbituric acid (Ia) and 5benzylidenebarbituric acid (Ib). Thus, only a 7% conversion to 1,3-dimethyl-5-benzylidenebarbituric acid could be realized by heating lb under reflux for one hour with dimethyl sulphate in aqueous sodium hydroxide, and no improvement in yield was realized with increased refluxing time. Under the same conditions, Ia was essentially recovered unchanged.

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