A Practical Synthesis of beta-Keto Thioesters by Direct Crossed-Claisen Coupling of Thioesters and N-Acylbenzotriazoles

[摘要]：Thioesters undergo chemoselective soft enolization and acylation with N-acylbenzotriazoles on treatment with MgBr2 center dot OEt2 and i-Pr2NEt to give beta-keto thioesters. Prior enolate formation is not required and the reaction is conducted using untreated dichloromethane open to the air.

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