Silver-Catalyzed Cascade Radical Bicyclization Reaction: An Atom- and Step-Economical Strategy Accessing γ-Lactam Containing Isoquinolinediones
Zeguo Fang, Wen Liu, Nawaf Al‐Maharik, Ruizhe Cao, Yingxue Huang, Yiting Yuan, Qian Zhang, Dong Li
Abstract
An efficient and convenient method for the cascade radical bicyclization of N -phenyl-4-pentenamides with N -methyl- N -methacryloylbenzamides under silver-catalyzed conditions is described. Based on this newly developed strategy, a variety of valuable γ-lactam containing isoquinolinediones can be effectively synthesized in one step within 0.5 h, during which two C–C bonds, one C–N bond, and two new N -heterocycles were formed concurrently. With N -aryl allyl carbamates, similar 2-oxazolidinone substituted isoquinolinedione compounds can likewise be produced. The approach demonstrates wide functional group compatibility, high step- and atom-economy, and the ability to be scaled up to gram quantities in a satisfactory yield. It marks the first instance of introducing γ-lactams into isoquinoline-1,3( 2H, 4H )-diones to construct linked hybrid drug-like molecules, thereby making this strategy highly attractive to drug discovery.