The First Preparation of 4-Substituted 1,2-Oxaborol-2(5<i>H</i>)-ols and their Palladium-Catalyzed Cross-Coupling with Aryl Halides to Prepare Stereodefined 2,3-Disubstituted Allyl Alcohols
作者:Min-Zhi Deng、Guo-Hua Fang、Zheng-Jun Yan、Jun Yang
DOI:10.1055/s-2006-926388
日期:——
4-Substituted 1,2-oxaborol-2(5H)-ols were prepared through copper-catalyzed carbomagnesation of propargyl alcohol, followed by the transmetallation of magnesium to boron in a one-pot procedure. The Suzuki-Miyaura cross-coupling of these new 2,2-disubstituted alkenylboronic acids with aryl halides afforded stereodefined 2,3-disubstituted allyl alcohols in good to excellent yields.
通过铜催化的丙炔醇碳镁反应,然后在一锅程序中将镁转化为硼,制备出了 4-取代的 1,2-氧硼烷醇-2(5H)-醇。将这些新的 2,2-二取代烯基硼酸与芳基卤化物进行 Suzuki-Miyaura 交叉偶联反应,可以得到立体定义的 2,3-二取代烯丙基醇,收率从良好到极佳。