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This paper reports the stereoselective synthesis of a modified tricyclic tyrosine analogue 3, whose conformation is constrained by the covalent bonds and designed on the basis of X-ray and solution structures of SH2 domain and its natural peptide ligand. A Michael addition followed by an alkylation in high stereoselections, a Friedel–Crafts and a Mannich reaction-based cyclization served as the key...
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