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A 1,4‐addition reaction of 5H‐oxazol‐4‐ones to alkylidene β‐ketoesters, which was catalyzed by using chiral guanidines via a dynamic kinetic resolution process that involved geometric isomerization of the alkylidene β‐ketoesters, was developed. This method allowed using E,Z isomeric mixture of various acyclic alkylidene β‐ketoesters to obtain the products stereoselectively. The relation between the...
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