A ruthenium(II) complex bearing a naphthyridine-functionalized pyrazole ligand catalyzes oxidant-free and acceptorless selective double dehydrogenation of primary amines to nitriles at moderate temperature. The role of the proton-responsive entity on the ligand scaffold is demonstrated by control experiments, including the use of a N-methylated pyrazole analogue. DFT calculations reveal intricate hydride and proton transfers to achieve the overall elimination of 2 equiv of H.

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One pot synthesis of acid esters by Stobbe condensation of alkylidene/ arylidene succinates and aldehydes or ketones, their subsequent hydrolysis of diacids and the formation of Tetralones and Indenones by different reagents are reported.

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