A practical synthesis of fibrinogen receptor antagonist MK-383. selective functionalization of (S)-tyrosine
作者:John Y.L. Chung、Dalian Zhao、David L. Hughes、Edward J.J. Grabowski
DOI:10.1016/s0040-4020(01)87943-6
日期:1993.6
phenolic and carboxylate oxygens of (S)-tyrosine that enable selective N-sulfonylation to be carried out in high yield; (3) the selective phenolic O-alkylation of the tyrosine derivative in high yield with no racemization using aqueous KOH/DMSO; and (4) the selective hydrogenation of the pyridine ring in the presence of the tyrosine ring using Pd/C in aceticacid.