期刊
JOURNAL OF ORGANIC CHEMISTRY
卷 80, 期 15, 页码 7770-7778出版社
AMER CHEMICAL SOC
DOI: 10.1021/acs.joc.5b01081
关键词
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资金
- NSFC [21072044, 21202034]
- Program for New Century Excellent Talents in University of Ministry of Education [NCET-11-0938]
- Program for Innovative Research Team from the University of Henan Province [14IRTSTHN006]
In the presence of an L-tert-leucine-derived urea ammonium salt as phase-transfer catalyst, a highly enantioselective alkylation of 5H-oxazol-4-ones with various benzyl bromides and allylic bromides has been developed to furnish catalytic asymmetric synthesis of biologically important dialkylated a-hydroxy carboxylic acids with a broad scope. This is the first example of an L-amino acid-derived urea ammonium salt being used as a phase-transfer catalyst with excellent catalytic efficiency.
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