The reaction rate of Doebner condensation to achieve cinnamic acids can be dramatically enhanced by irradiating the reaction mixture containing an aromatic aldehyde, malonic acid, pyridine and a trace of piperidine with a commercial microwave oven. Ten cinnamic acids were synthesized within 2-5 min in excellent yields.

A K MITRA

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N KARCHAUDHURI

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

Application of Microwave Irradiation Techniques for the Syntheses of Cinnamic Acids by Doebner Condensation

Synthetic Communications

Hexamethylenetetramine has been exploited for the first time successfully as a catalyst for the Doebner reaction and Knoevenagel condensation along with the rate enhancement by microwave irradiation under solvent-free conditions.

Journal of Chemical Research - Part S

Microwave-assisted condensation reactions exploiting hexamethylenetetramine as a catalyst under solvent-free conditions

Microwave irradiation of ketosemicarbazones with wet antimony trichloride under solvent-free condition provides a fast, efficient and simple method for the regeneration of ketones in good yields.

Solid state regeneration of ketones from semicarbazones using antimony trichloride under microwave irradiation

Applied Surface Science

Pore size engineering of hexagonal mesoporous carbon nitride (HMCN) for high catalytic performance in the synthesis of α, β-unsaturated acid and its derivatives

Catalysis Letters

Pore Size Architecture of Hexagonal Mesoporous Carbon Nitride (HMCN) for Metal-Free Synthesis of p-Hydroxycinnamic Acid

The key intermediates, the keto lactones 5, 6 obtained by convergent synthesis, were transformed into furanoid and dioxabicyclo[3.3.0]octane lignan analogues 7, 8 by means of sodium borohydride reduction and subsequent acid-catalysed cyclisation.

Journal of the Chemical Society, Perkin Transactions 1

Simple synthesis of furanoid and dioxabicyclo[3.3.0]octane lignans

Synlett

Heck Reactions under Microwave Irradiation in Solvent-Free Conditions

Microwave Enhanced Knoevenagel Condensation of Ethyl Cyanoacetate with Aldehydes

Tetrahedron

Microwave assisted organic reactions

Research in Nursing & Health

Announcements

Application of microwave irradiation techniques for the syntheses of cinnamic acids by Doebner condensation

Journal	Synthetic Communications
Publisher	Marcel Dekker Inc.
ISSN	0039-7911