Shen G, Zhou WJ, Zhang XB, Cao GM, Zhang Z, Ye JH, Liao LL, Li J, Yu DG. Synthesis of tetronic acids from propargylic alcohols and CO
2.
Chem Commun (Camb) 2018;
54:5610-5613. [PMID:
29770416 DOI:
10.1039/c8cc03039a]
[Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
A direct and practical synthesis of important tetronic acids from easily available propargylic alcohols and carbon dioxide is reported for the first time. This transition-metal-free transformation features high atom- and step-economy, mild reaction conditions, good functional group tolerance and high yield. Preliminary mechanistic studies suggest that the reaction proceeds via cyclization to give alkylidene cyclic carbonate, ring-opening and re-cyclization processes.
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