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Sadeghpour, M. (2016). An efficient one-Pot green synthesis of 4H-Benzo[b]pyrans using guanidinium chloride as polyfunctional organocatalyst. Iranian Chemical Communication, 4(Issue 1, pp. 1-132), 57-66.
Mahdieh Sadeghpour. "An efficient one-Pot green synthesis of 4H-Benzo[b]pyrans using guanidinium chloride as polyfunctional organocatalyst". Iranian Chemical Communication, 4, Issue 1, pp. 1-132, 2016, 57-66.
Sadeghpour, M. (2016). 'An efficient one-Pot green synthesis of 4H-Benzo[b]pyrans using guanidinium chloride as polyfunctional organocatalyst', Iranian Chemical Communication, 4(Issue 1, pp. 1-132), pp. 57-66.
Sadeghpour, M. An efficient one-Pot green synthesis of 4H-Benzo[b]pyrans using guanidinium chloride as polyfunctional organocatalyst. Iranian Chemical Communication, 2016; 4(Issue 1, pp. 1-132): 57-66.

An efficient one-Pot green synthesis of 4H-Benzo[b]pyrans using guanidinium chloride as polyfunctional organocatalyst

Article 5, Volume 4, Issue 1, pp. 1-132, Winter and Spring 2016, Page 57-66  XML PDF (599 K)
Document Type: Original Research Article
Author
Mahdieh Sadeghpour
Department of Chemistry, Takestan Branch, Islamic Azad University, Takestan, Iran
Abstract
A simple, efficient, and high yielding one-pot protocol has been developed for the synthesis of 4H-benzo[b]pyrans scaffolds installing a three-component tandem Knoevenagel-cyclocondensation reaction of an aldehyde, malononitrile and dimedone using guanidinium chloride as polyfunctional organocatalyst under solvent-free conditions in high to excellent yields. Various aromatic aldehydes were utilized in the reaction and in all situations the desired product were synthesized successfully. The advantageous features of this methodology are operational simplicity, convenient work-up procedures, shorter reaction time and avoiding the use of toxic solvents and purification of products by non-chromatographic methods. The generality and functional tolerance of this convergent and environmentally benign method is demonstrated.

Graphical Abstract

An efficient one-Pot green synthesis of 4H-Benzo[b]pyrans using guanidinium chloride as polyfunctional organocatalyst
Keywords
dimedone; 4H-benzo[b]pyran; malononitrile; aldehyde; guanidinium chloride
Main Subjects
Organic chemistry
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