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Synthesis 2012; 44(13): 2079-2083
DOI: 10.1055/s-0031-1291161
DOI: 10.1055/s-0031-1291161
paper
Montmorillonite K-10 Catalyzed, Microwave-Assisted Cyclization of Acetylenic Amines: An Efficient Synthesis of Pyrrolocoumarins and Pyrroloquinolones
Further Information
Publication History
Received: 22 February 2012
Accepted after revision: 24 April 2012
Publication Date:
31 May 2012 (online)
Abstract
A microwave-assisted montmorillonite K-10 catalyzed synthesis of pyrrolocoumarins and pyrroloquinolones from acetylenic amine is described. The reaction utilizes montmorillonite K-10 as an inexpensive, recyclable, and environmentally benign acid catalyst. Reactions were completed in few minutes under microwave irradiation and provided excellent yields. The efficient and eco-friendly catalyst and the convenience of the product isolation make the process an attractive alternative for the synthesis of these important heterocycles.
Key words
microwave irradiation - montmorillonite K-10 - acetylenic amine - pyrrolocoumarin - pyrroloquinoloneSupporting Information
- for this article is available online at http://www.thieme-connect.com/ejournals/toc/synthesis.
- Supporting Information
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