Erbium(III) Triflate is a Highly Efficient Catalyst for the Synthesis of beta-Alkoxy Alcohols, 1,2-Diols and beta-Hydroxy Sulfides by Ring Opening of Epoxides

[摘要]：Chemo- and stereoselectivity in the ring-opening reaction of epoxides with erbium(III) triflate are described. Epoxides can be cleaved under neutral conditions with alcohols and thiols in the presence of catalytic amounts of Lewis acid, affording the corresponding beta-alkoxy alcohols and beta-hydroxy sulfides in high yields. In water, epoxide ring opening occurs to produce the corresponding diols in good yields

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