Ceric ammonium nitrate (CAN) (10 mol%) in ethanol has been found to be an efficient catalyst for the one-pot multi-component synthesis of fully substituted new indeno[1,2-b]pyridines through a combination of 1,3-indandione, propiophenone or 2-phenylacetophenone, aromatic aldehydes, and ammonium acetate at room temperature. The same methodology also worked well for the construction of several other 2,3,4,5,6-pentasubstituted pyridines at room temperature. Atom economy, excellent yields and mild reaction conditions are some of the important features of this protocol. © ARKAT-USA, Inc.

CHHANDA MUKHOPADHYAY

Chemistry

P K TAPASWI

Fulltext

University of Calcutta (informally known as Calcutta University or CU) is a collegiate public state university located in Kolkata, West Bengal, India.&nbsp;Within India it is recognized as a &quot;Five-Star University&quot; and accredited &quot;A&quot; Grade by National Assessment and Accreditation Council.

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The University of Calcutta has secured the Fifth position among the Universities of India in the prestigious &quot;Indian University Ranking 2019&quot; list, released by the NIRF of the Ministry of Human Resource Development, Government of India.

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It was established on 24 January 1857, and was one of the first institutions in Asia to be established as a multidisciplinary and Western-style university. Its alumni and faculty include several heads of state, heads of government, social reformers, prominent artists, only academy award winner and Dirac medal winner in India, many Fellows of the Royal Society and five Nobel laureates as of 2019 which is highest in South Asia.

University Of Calcutta

Arkivoc

Electron-deficient (dibenzoylmethanato)boron difluoride (DBMBF2) can efficiently discriminate between electron-rich polynuclear aromatic hydrocarbons like naphthalene (A1), anthracene (A2) or phenanthrene (A3). Even using the same sort of electron donor-acceptor (EDA) interaction, DBMBF2, can recognise different polar polynuclear aromatic systems containing indeno-pyridine groups (I1-I3). EDA Interaction has been studied both in the ground and excited states for all the six interacting systems (A, I). In all cases, absorption isosbestic has been established, but DBMBF2 forms iso-emissive complexes only with A1, A3, I1 and I3. Ground state association constants for all the complexes are varied widely. Anthracene (A2) and indeno-pyridine (I2) can be discriminated easily with their high binding constants. Theoretical justification for complex formations in terms of geometry, heat of formation, charge distribution and HOMO-LUMO interactions are provided on the basis of DFT calculations. © 2012 Elsevier B.V.

Journal of Photochemistry and Photobiology A: Chemistry

Molecular recognition of anthracene and indeno-pyridine by (dibenzoylmethanato)boron difluoride in ethanol

Ceric ammonium nitrate (CAN) catalyzed one-pot synthesis of fully substituted new indeno[1,2-b]pyridines at room temperature by a multi-component reaction

Journal	Arkivoc
Publisher	Arkat
ISSN	1551-7012
Open Access	Yes