作者:Benoît Moreau、Dino Alberico、Vincent N.G. Lindsay、André B. Charette
DOI:10.1016/j.tet.2011.05.113
日期:2012.4
A Cu(I)-catalyzed asymmetric cyclopropanation of alkenes with an iodonium ylide has been developed. The copper source, hypervalent iodine source, solvent, and additives all have a significant effect on the yields and enantioselectivities. High enantioselectivity (up to 99:1 er) and diastereoselectivity (95:5 dr trans/cis) were achieved for a wide range of alkenes. Conditions were developed to convert
已经开发了具有碘鎓内鎓盐的Cu(I)催化的烯烃的不对称环丙烷化反应。铜源,高价碘源,溶剂和添加剂都对产率和对映选择性有重要影响。对于多种烯烃,均实现了高对映选择性(高达99:1 er)和非对映选择性(95:5 dr反式/顺式)。研究了将反式产物转化为顺式异构体的条件。另外,将1-硝基环丙基羧酸盐转化成相应的取代的环丙烷氨基酸和氨基环丙烷。此外,还记录了这些化合物中Zn介导的In和In介导的硝基还原反应之间关于腐蚀的比较研究。