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Iron(III) Chloride mediated reduction of Bis(1-isoquinolylcarbonyl)amide to an Amide

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Abstract

In methanol, FeCl3 reacted readily with L1H (L1H = bis(1-isoquinolylcarbonyl)amide) and afforded a complex having the formula [Fe(L2)Cl2] (1) {L2 = N-((1-isoquinolyl)(methoxy)methyl)isoquinoline-1-carboxamide ion}. This reaction involves reduction of one of the two carbonyl groups present in L1H to (methoxy)methyl group. A plausible mechanism for the conversion of L1H to L2 has been proposed. Determination of molecular structure of 1 confirmed this conversion. Fe(III) ion is surrounded by three nitrogen atoms of the ligand and two chloride ions, imparting a rare distorted trigonal bipyramidal N3Cl2 coordination environment.

In methanol, FeCl3 reacted with bis(1-isoquinolylcarbonyl)amide affording N-((1-isoquinolyl)(methoxy)methyl)isoquinoline-1-carboxamide bound iron(III) complex. This reaction involves reduction of one of the two carbonyl groups to (methoxy)methyl group.

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Acknowledgements

We are grateful to the Department of Science and Technology (DST), New Delhi, for financial grant and establishing the single crystal X-ray diffractometer facility under FIST scheme. The authors are thankful to Dr. Babulal Das for the X-ray data.

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Correspondence to VADIVELU MANIVANNAN.

Additional information

Dedicated to Professor Animesh Chakravorty on the occasion of his 80th birth anniversary.

Supplementary Information (SI)

CCDC number 987001 contains the supplementary crystallographic data for complex 1. This data can be obtained free of charge via http://www.ccdc.ac.uk/conts/retrieving.html or from the Cambridge Crystallographic Data Centre, 12 Union Road, Cambridge CB2 1EZ, UK; fax: (+44) 1223-336-033; or e-mail: deposit@ccdc.cam.ac.uk. IR spectrum of 1 is provided which is available at www.ias.ac.in/chemsci.

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SAHU, R., CHALIHA, P. & MANIVANNAN, V. Iron(III) Chloride mediated reduction of Bis(1-isoquinolylcarbonyl)amide to an Amide . J Chem Sci 128, 37–42 (2016). https://doi.org/10.1007/s12039-015-1001-0

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