Duan S, Jana R, Tunge JA. Lewis acid-catalyzed diastereoselective hydroarylation of benzylidene malonic esters.
J Org Chem 2009;
74:4612-4. [PMID:
19518152 DOI:
10.1021/jo900367g]
[Citation(s) in RCA: 34] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
Herein we report that simple Lewis acids catalyze the hydroarylation of benzylidene malonates with phenols. Ultimately, 3,4-disubstituted dihydrocoumarins are obtained via a hydroarylation-lactonization sequence. Moreover, the dihydrocoumarins are formed with a high degree of diastereoselectivity favoring the trans stereoisomer.
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