Add time:08/12/2019         Source:sciencedirect.com

A practical procedure to regioselectively install a methyl group and a phenolic hydroxyl group onto l-tyrosine was developed. By using this approach, protected l-3-hydroxy-4-methoxy-5-methyl-phenylalanine and l-3-hydroxy-4-methoxy-5-methyl-phenylalanol, which are utilized in efficient syntheses of the relevant tetrahydroisoquinoline alkaloids, were prepared conveniently with high yield.

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