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Selective demethylation of 3,4-dimethoxybenzaldehyde

✍ Scribed by R.H. Prager; Y.T. Tan

Book ID: 104241034
Publisher: Elsevier Science
Year: 1967
Tongue: French
Weight: 161 KB
Volume: 8
Category: Article
ISSN: 0040-4039
DOI: 10.1016/s0040-4039(01)89768-9

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✦ Synopsis

A recent report by Brossi (1) on the seleotive acid-catalpaed demethylation of the methoxyl group substituted m to a carbonyl function prompts this report of similar work.

We were interested in developing a method for the seleotive, stepwise demethylation of the aoridoae alkaloid melioopiciae, (I), and chose to use veratraldme as a model compound to et-the effeot of varying the demethylating agent, solvent, and tmpclwturs.

The use of Lewis aaids, such as aluminiue chloride, boron triohloride, boron tribromide and pyridinium hydrochloride was first studied. In agreement with the work of

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