Volume 32, Issue 12 e4582
FULL PAPER

Synthesis and structure of arene ruthenium(II) complexes: One-pot catalytic approach to synthesis of bioactive quinolines under mild conditions

Muthumari Subramanian

Muthumari Subramanian

Centre for Organometallic Chemistry, School of Chemistry, Bharathidasan University, Tiruchirappalli, 620 024 Tamil Nadu, India

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Saranya Sundar

Saranya Sundar

Centre for Organometallic Chemistry, School of Chemistry, Bharathidasan University, Tiruchirappalli, 620 024 Tamil Nadu, India

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Ramesh Rengan

Corresponding Author

Ramesh Rengan

Centre for Organometallic Chemistry, School of Chemistry, Bharathidasan University, Tiruchirappalli, 620 024 Tamil Nadu, India

Correspondence

Ramesh Rengan, Centre for Organometallic Chemistry, School of Chemistry, Bharathidasan University, Tiruchirappalli 620 024, Tamil Nadu, India.

Email: [email protected]

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First published: 03 October 2018
Citations: 28

Abstract

Efficient catalytic one-step synthesis of substituted quinoline derivatives using newly synthesized Ru(II) half-sandwich complexes of the type [Ru(η6-p-cymene)Cl(L)] (L = pyrrole-2-aldehydehydrazones) under mild conditions is described. The synthesized complexes exhibit excellent catalytic activity towards the coupling of 2-amino alcohol with functionalized ketones and secondary alcohols in the optimal conditions and afforded the corresponding quinoline derivatives. The synthetic pathway proceeds with high atom efficiency via a sequence of acceptorless dehydrogenation and condensation steps. The maximum isolated yield of the product obtained was up to 97% using 0.3 mol% of catalyst loading for 5 h. These findings significantly advance the scope of the synthesis of bioactive heterocyclic compounds from readily available starting materials.

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