The combination of Et2Zn and RhCl(PPh3)3 led to the facile generation of a rhodium–hydride complex (Rh–H) that catalyzed the 1,4-reduction of α,β-unsaturatedesters. The resulting rhodium enolate performed as a Reformatsky-type reagent and reacted with various imines to give syn-β-lactams in good to excellent yields with high diastereoselectivity.
Et 2 Zn和RhCl(PPh 3)3的组合导致容易生成铑-氢化物络合物(Rh-H),该络合物催化α,β-不饱和酯的1,4-还原。所得的烯醇铑作为Reformatsky型试剂起作用,并与各种亚胺反应,以良好的非对映异构体收率以优异的产率得到合成的-β-内酰胺。