Ru(II)‐Pheox Catalyzed Highly Stereoselective Cyclopropanation of Allyl‐ and Vinylsilanes with Diazoesters and Their Synthetic Applications
作者:Nansalmaa Otog、Hayato Inoue、Doan Thi Thuy Trinh、Zolzaya Batgerel、Niklas Maximilian Langendorf、Ikuhide Fujisawa、Seiji Iwasa
DOI:10.1002/cctc.202001427
日期:2021.1.12
catalyst for cyclopropanation reactions of diazoesters with various allylsilanes. Also, methyl(diazoacetoxy)acetate afforded in significantly enhanced yields, diastereoselectivities, and enantioselectivities. The cyclopropanation reactions with vinylsilanes with methyl (diazoacetoxy)acetate proceeded with excellent diastereoselectivities (>99 : 1 d.r.). Moreover, cyclopropylsilane derivatives could be successfully
由各种烯丙基和乙烯基硅烷与官能化的重氮酸酯进行立体选择性合成的光学活性环丙基硅烷,具有优异的收率(高达99%)和非对映异构体(高达> 99:1 dr)和对映选择性(高达99%ee)。 Ru(II)-Pheox催化剂的存在。在一系列Ru(II)-Pheox催化剂中,p-MeO-Ru(II)-Pheox被确定为重氮酸酯与各种烯丙基硅烷的环丙烷化反应的最佳催化剂。同样,(重氮乙酰氧基)乙酸甲酯的产率,非对映选择性和对映选择性也大大提高。用乙烯基硅烷与(重氮乙酰氧基)乙酸甲酯进行的环丙烷化反应具有出色的非对映选择性(> 99:1 dr)。此外,环丙基硅烷衍生物可以成功地转化为合成生物活性化合物的有益构件,包括抗HIV药物和Imatinib-7。