Journal
ORGANIC LETTERS
Volume 6, Issue 12, Pages 2015-2017Publisher
AMER CHEMICAL SOC
DOI: 10.1021/ol0493554
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A metal-catalyzed tandem 1,4-addition/cyclization between propargyl alcohol and a Michael acceptor, such as alkylidene malonate, has been developed. In the presence of catalytic amounts of zinc triflate [Zn(OTf)(2)] and triethylamine (Et3N), various 2-alkylidene-1,3-dicarbonyl compounds reacted with propargyl alcohol to give 3- or 4-methylene tetrahydrofurans in excellent yields.
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