4-Benzyloxy-3-methoxy benzaldehyde

Benzyloxy-4-methoxy-benzaldehyd wird zu 22% aus dem entspreehenden N-Methyl-benzylamin und Sauerstoff in Gegenwart von Kupfer(I)-chlorid erhalten126 ... 

The reaction has been carried out on large- and small-scale batches (Note 10). This modification, as exemplified by 3,4,5-trimethoxybenzaldehyde, has been applied by the submitters to the preparation of other aldehydes such as 3,4-dimethyl-benzaldehyde (90% yield), 3-benzyloxy-4,5-dimethoxybenz-aldehyde (88% yield, with retention of the benzyl group), and 3-methoxy-4-nitrobenzaldehyde (62% yield, with retention of the nitro group). 

In the case of alkoxytetraarylantimony compounds, the thermal decomposition occurs intramolecularly to afford either oxidation products or the 0-aryl ethers. 21 jq tiie case of the (methoxy)tetraphenylantimony compound (12), anisole was obtained in a poor yield (10%). The O-aryl ether was completely absent in the thermolysis of the analogous (benzyloxy)tetraphenylantimony compound which led exclusively to the oxidation product, benzaldehyde.2l... 

Auf diese Weise wird die Decarbonylierung des Trimethoxybenzaldehydes vermieden, die beim Arbeiten unter klassischen Reaktionsbedingungen" auftreten kann22. Auf die glei-che Weise werden 3-Methoxy-4-nitro- (62%), 3,4-Dimethyl- (90%) und 3-Benzyloxy-4,5-dimethoxy-benzaldehyd (88%) erhalten. 

Subramanian [43] subjected polystyrene peroxide to ultraviolet radiation and analysed degradation products produced during photodecomposition by GC-MS. These included benzaldehyde, a-hydroxy acetophenone, phenyl glycol, a-methoxy acetophenone and a-benzyloxy acetophenone. 

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