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A stereoselective synthesis of oxindole‐derived α‐alkoxy‐β‐amino acid derivatives was achieved in high yield with excellent diastereoselectivity through the three‐component reaction of methyl 2‐diazoarylacetate, aryl alcohols, and isatin‐derived ketimines by using Rh2(OAc)4 (1 mol‐%) as the catalyst. The products are very useful for the synthesis of analogues of the gastrin receptor antagonist AG‐041R,...
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