LAUSR

ABSTRACT Heterocyclic compounds are widely present in the core structures of several natural products, pharmaceuticals, and agrochemicals. Over the years, synthesis of heterocyclic products via C−H activation in a step and atom-economical manner has won impressive advances as a newly emerging synthetic strategy. Recently, the strategy of transition metal catalyzed C−H bond activation of arenes without using prefunctionalized starting materials has emerged as a powerful tool to create the different class of heterocycles. This review is mainly focused on the recent developments in the synthesis of heterocyclic compounds such as benzofurans, indoles, quinolinones and quinolines with diverse coupling partners via inter and intramolecular C−H functionalization reactions. The methodologies described in this review are preferably exogenous directing group free approaches.