52186-44-4Relevant articles and documents
A new approach to the synthesis of l-3-hydroxy-4-methoxy-5-methyl-phenylalanine derivatives from l-tyrosine
Chen, Ruijiao,Zhu, Deguang,Hu, Zuoqiang,Zheng, Zhiming,Chen, Xiaochuan
experimental part, p. 39 - 42 (2010/04/24)
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.
A convenient two step transformation of tyrosine into the antihypertensive amino acid (S)-4-hydroxy-3-hydroxymethylphenylalanine
Allevi, Pietro,Cribiu, Riccardo,Anastasia, Mario
, p. 1355 - 1358 (2007/10/03)
Treatment of tyrosine with paraformaldehyde and catalytic amounts of p-toluenesulfonic acid, at reflux in toluene, directly generates benzyl (S)-4-(4H-1,3-benzodioxin-6-ylmethyl)-5-oxo-1,3-oxazolane-3-carboxylate, which on treatment with boron trichloride in dichloromethane, affords (S)-4-hydroxy-3-hydroxymethylphenylalanine.