Under control: A chiral imidazoline–aminophenol/Ni(OAc)2 complex promotes the first catalytic asymmetric exo′‐selective [3+2] cycloaddition of iminoesters and nitroalkenes. Thermodynamic control over the stepwise Michael/Mannich cyclization steps gives the adducts in up to 99 % ee.
下控制:手性
咪唑啉-
氨基苯酚/
镍(OAC)2络合物促进第一催化不对称外切' -选择性[3 + 2] iminoesters和硝基烯烃的环加成。通过逐步进行Michael / Mannich环化步骤的热力学控制,可以使加合物的ee高达99% 。