Ru(ii)-catalyzed allenylation and sequential annulation of N-tosylbenzamides with propargyl alcohols

We hereby report Ru(ii)-catalyzed C(sp(2))-H allenylation of N-tosylbenzamides to access multi-substituted allenylamides. Furthermore, the allenylamides were converted to the corresponding isoquinolone derivatives via base mediated annulation. The current protocol features low catalyst loading, mild reaction conditions, high functional group compatibility and desired scalability. The unique functionality of the afforded allenes allowed further transformations to expand the practicality of the protocol.

Automated summary

This study reported the Ru(ii)-catalyzed C(sp(2))-H arylation of N-tosylbenzamides to access multi-substituted allenylamides, which were further converted to isoquinolone derivatives via base mediated annulation. The protocol features low catalyst loading, mild reaction conditions, high functional group compatibility, and scalability. The unique functionality of the produced allenes allowed for further transformations, expanding the practicality of the protocol.