Umpolung Synthesis of 1,3-Amino Alcohols: Stereoselective Addition of 2-Azaallyl Anions to Epoxides
作者:Paige E. Daniel、Alexandria E. Weber、Steven J. Malcolmson
DOI:10.1021/acs.orglett.7b01471
日期:2017.7.7
report the direct preparation of 1,3-amino alcohols that contain up to three contiguous stereogenic centers by the umpolung coupling of imines and epoxides. Nucleophilic 2-azaallyl anions, generated from imines, are stereoselectively added to epoxides to furnish 1,3-amino alcohols after hydrolysis of the product imine. Transformations afford amino alcohols with >98% site selectivity with respect to
我们报道了通过亚胺和环氧化物的偶联偶联直接制备包含多达三个连续的立体中心的1,3-氨基醇。由亚胺生成的亲核性2-氮杂烯丙基阴离子在产物亚胺水解后被立体选择性地添加到环氧化物中,以提供1,3-氨基醇。转化使氨基醇相对于两个反应伙伴都具有> 98%的位点选择性,并且产率高达> 98%,并且dr> 20:1。