Less variation of the ∠P–Rh–P made olefin-insertion and CO-insertion easier to occur and resulted in higher aldehyde selectivity (L1-system).

Abstract:A highly efficient construction of phenanthridinone derivatives from o-halobenzamides was developed by using a phosphine-free palladium catalyst in N,N-dimethylacetamide. The domino reaction proceeds through a sequential C-C and C-N bond-formation process in one pot. This protocol exhibits broad substrate scope and affords a series of phenanthridin-

Scope to o-Chlorobenzamides. -(LIU, H.; HAN, W.; LI, C.; MA, Z.; LI, R.; ZHENG, X.; FU*, H.; CHEN, H.; Eur. J. Org. Chem. 2016, 2, 389-393, http://dx.