Synthesis of<i>syn</i>and<i>anti</i>1,4-Diols by Copper-Catalyzed Boration of Allylic Epoxides
作者:Mariola Tortosa
DOI:10.1002/anie.201100613
日期:2011.4.18
Two sides of the same coin: Syn and anti 1,4‐diols have been synthesized through the regio‐ and diastereoselective CuI‐catalyzed boration of allylic epoxides (see scheme; pin=pinacolato, TES=triethylsilyl). In situ protection of the alcohol allows isolation of syn and anti 1,4‐silyloxyboronates. Monoprotected 1,4‐diols can be prepared by a one‐pot addition–protection–oxidation sequence.
同一枚硬币的两面:通过区域和非对映选择性Cu I催化的烯丙基环氧化物硼酸化合成了顺式和反1,4-二醇(参见方案; pin = pinacolato,TES = triethylsilyl)。酒精的原位保护可以分离合成顺式和反式1,4-甲硅烷基氧硼酸酯。可以通过一锅加成-保护-氧化顺序来制备单保护的1,4-二醇。