Enantioselective and Regiodivergent Functionalization of<i>N-</i>Allylcarbamates by Mechanistically Divergent Multicatalysis
作者:Edward Richmond、Ismat Ullah Khan、Joseph Moran
DOI:10.1002/chem.201602792
日期:2016.8.22
A pair of mechanistically divergent multicatalytic reaction sequences has been developed consisting of nickel‐catalyzed isomerization of N‐allylcarbamates and subsequent phosphoric‐acid‐catalyzed enantioselective functionalization of the resulting intermediates. By appropriate selection of reaction partners, in situ generated imines and ene‐carbamates are mechanistically partitioned to yield opposing
已开发出一对机理不同的多催化反应序列,包括N烯丙基氨基甲酸酯的镍催化异构化以及随后的磷酸催化的中间体的对映选择性官能化。通过反应伙伴的适当选择,在原位产生的亚胺和烯氨基甲酸酯被机械地划分,以产生相对的官能化产物。芳烃亲核体的对映选择性Friedel-Crafts反应可实现形式化的α-官能化,从而得到受保护的α-芳基胺,而对映选择性Povarov- [4 + 2]环加成反应则可通过与二丙胺类亲电试剂进行反应而实现正式的β-官能化。