Zhang T, Yang Z, Zhou D, Meng F, Han Z, Huang H. Non-metal Lewis acid-catalyzed cross-Claisen condensation for β-keto esters.
Org Biomol Chem 2021;
19:9163-9166. [PMID:
34642729 DOI:
10.1039/d1ob01785c]
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Abstract
In this work, we disclose a new catalytic and highly chemoselective cross-Claisen condensation of esters. In the presence of TBSNTf2 as a non-metal Lewis acid, various esters can undergo cross-Claisen condensation to form β-keto esters which are important building blocks. Compared with the traditional Claisen condensation, this process, employing silyl ketene acetals (SKAs) as carbonic nucleophiles to achieve cross-Claisen condensation, requires mild conditions and has good tolerance of functional groups.
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