Straightforward Method for the Synthesis of Selenocysteine and Selenocystine Derivatives from L-Serine Methyl Ester

[摘要]：A set of selenoamino acids has been efficiently synthesized under smooth conditions by a simple, flexible and modular strategy. In this method, O-mesylated L-serine methyl ester is generated in situ and directly substituted with various selenolate anions to afford selenocysteine, selenolanthionine, and selenocystine derivatives in good yields. Also, a tellurocysteine derivative can be obtained by this method.

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