Rh(I)-Catalyzed Cascade Carbonylative Cyclization of Propargyl α-Diazoindolacetates for Construction of Carbazoles.
Guo-Hao ZhuXuefeng JiangPublished in: Organic letters (2023)
A Rh(I)-catalyzed carbene migration/carbonylation/cyclization (MCC) strategy has been established for the construction of diverse functionalized carbazoles from propargyl α-diazoindolacetates. Rh(I)-stabilized carbene with different electrophilic properties displays specific reactivity toward alkyne and CO during the transformation, ensuring the smooth progress of the tandem cyclization. Other heteroaryl scaffolds were achieved simultaneously through this cascade protocol, thus offering a straightforward pathway toward functionalized polycyclic aromatic molecule synthesis.