acetals 2a-h and 5a-d, readily deriving from the α-chiral alcohols 1a-h and ethyl vinyl ether or isopropenyl methyl ether, underwent selective elimination of primary alcohol upon treatment with triethylamine and trimethylsilyl trifluoromethanesulfonate, and thus afforded good to high yields of the chiral enol ethers 3a-h and 6a-d, respectively.
易于从α-手性醇1a-h和乙基
乙烯基醚或异
丙烯基甲基醚衍生而来的混合
缩醛2a-h和5a-d,在用
三乙胺和三甲基甲
硅烷基
三氟甲磺酸酯处理后,选择性地除去了伯醇,因此得到了良好的高分别得到手性烯醇醚3a-h和6a-d的产率。