The DielsâAlder reaction of vinylboronates can be easily performed using microwave irradiation giving excellent yields of the cycloadducts. Pinacol vinylboronate was the reagent of choice due to its stability towards hydrolysis, operational simplicity and yields of DielsâAlder products. To the best of our knowledge, this is the first example of microwave-assisted DielsâAlder reaction of boron-substituted dienophiles. Subsequent in situ oxidation of the cycloadducts with alkaline hydrogen peroxide afforded the alcohols efficiently.
乙烯基硼酸酯的狄尔斯-阿尔德反应可以使用微波辐射轻松进行,从而获得优异的环加合物产率。由于其对
水解的稳定性、操作简单性和 Diels-Alder 产品的产率,
频哪醇乙烯基硼酸酯成为首选试剂。据我们所知,这是微波辅助
硼取代亲双烯体的狄尔斯-阿尔德反应的第一个例子。随后用碱性
过氧化氢对环加合物进行原位氧化,有效地提供了醇。