作者:Enhui Ji、Haiwen Meng、Yue Zheng、Velayudham Ramadoss、Yahui Wang
DOI:10.1002/ejoc.201901435
日期:2019.11.30
Copper‐catalyzed highly stereospecific hydroboration of internal allylic alcohols using a silyl ether transient protection strategy is reported. This in situ protection effectively avoids the preferential side reaction of free hydroxyl group with boron reagent, thus promoting hydroboration. This method provides both the anti‐ and the syn‐ diastereomers of 1,3‐diols in high level of diastereomeric ratios
据报道,使用甲硅烷基醚瞬态保护策略,铜催化内部烯丙基醇的高度立体定向氢硼化。这种原位保护有效地避免了游离羟基与硼试剂的优先副反应,从而促进了硼氢化反应。此方法同时提供抗-和SYN在高电平非对映体比率具有官能团的耐受性良好的1,3-二醇非对映体- 。