ChemInform Abstract: Cycloisomerization of Allene—Enol Ethers under Bi(OTf)₃ Catalysis.

Abstract

Cycloisomerization of Allene-Enol Ethers under Bi(OTf) 3 Catalysis. -Bi(OTf) 3 selectively promotes the activation of the enol ether moiety of the substrate accessing interesting functionalized cyclopentene rings. The method is extended to the synthesis of dihydrofuran and oxaspirocycle derivatives. -(ONDET, P.; JOFFRIN, A.; DIAF, I.; LEMIERE*, G.; DUNACH, E.; Org. Lett. 17 (2015) 4, 1002-1005, http://dx.doi.org/10.1021/acs.orglett.5b00110 ; Inst. Chim., Univ. Nice-Sophia-Antipolis, F-06108 Nice, Fr.; Eng.) -H. Toeppel 28-030