Ligand-Promoted Asymmetric Imino-Reformatsky Reaction of Ethyl Dibromofluoroacetate
作者:Atsushi Tarui、Haruka Nishimura、Takeshi Ikebata、Asuka Tahira、Kazuyuki Sato、Masaaki Omote、Hideki Minami、Yoshihisa Miwa、Akira Ando
DOI:10.1021/ol500631j
日期:2014.4.18
An enantioselective Reformatsky reaction has been developed for the reaction of ethyl dibromofluoroacetate (1) with an imine. This method represents the first ligand-promoted imino-Reformatslcy approach to use a halofluoroacetate. The use of an amino alcohol ligand allowed for the preparation of enantioenriched alpha-bromo-alpha-fluoro-beta-lactams in good yields with enantioselectivities up to 96% ee. This process also provided access to beta-lactam rings bearing two stereogenic centers.