An efficient protocol for a one-pot synthesis of mono-sulfonamides has been developed. It features utilization of excess of sulfonylating agent followed by base mediated recovery of the primary sulfonamide.
been showcased. Interestingly, the nitrogenatom of the isoquinoline ring is coming from the reaction medium upon metal-assisted C≡N bond cleavage. Moreover, this (5+1) annulation reaction shows broad substrate variation. Furthermore, the derivatization of the isoquinoline core via functional group interconversions and mechanistic studies to identify the reaction intermediate have been carried out