N1,N1,N2,N2-Tetramethylethylenediaminium-N1,N2-disulfonic Acid Trifluoroacetate as Highly Effectual and Dual-Functional Catalyst for the Reaction of β-Ketoesters with Aryl Aldehydes and Urea/Thiourea
Publish place: Chemical Methodologies، Vol: 3، Issue: 4
Publish Year: 1398
نوع سند: مقاله ژورنالی
زبان: English
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شناسه ملی سند علمی:
JR_CHM-3-4_009
تاریخ نمایه سازی: 20 مهر 1398
Abstract:
In this research, the one-pot multi-component reaction of β-ketoesters with aryl aldehydes and urea/thiourea has been performed using a dual-functional ionic liquid-catalyst namely N1,N1,N2,N2-tetramethylethylenediaminium-N1,N2-disulfonic acid trifluoroacetate ([TMEDSA][TFA]2) in solvent-free conditions. By reason of dual-functionality of the catalyst (possessing acidic and basic sites), and also having two numbers of each site, it was highly effectual and general catalyst, and afforded the products {3,4-dihydropyrimidin-2-(1H)-ones and 3,4-dihydropyrimidin-2-(1H)-thiones} in short times with excellent yields. Moreover, a plausible mechanism based on dual-functionality of the catalyst has been proposed.
Keywords:
3 , 4-dihydropyrimidin-2-(1H)-one , 3 , 4-dihydropyrimidin-2-(1H)-thione , Ionic Liquid , Dual-functional catalyst N1 , N1 , N2 , N2-Tetramethylethylenediaminium-N1 , N2-disulfonic acid trifluoroacetate ([TMEDSA][TFA]2)
Authors
Mostafa Karami
Department of Chemistry, Payame Noor University, PO Box ۱۹۳۹۵-۳۶۹۷ Tehran, Iran
Bentolhoda Gholami
Department of Chemistry, Payame Noor University, PO Box ۱۹۳۹۵-۳۶۹۷ Tehran, Iran
Tahereh Hekmat-Zadeh
Department of Chemistry, Payame Noor University, PO Box ۱۹۳۹۵-۳۶۹۷ Tehran, Iran
Abdolkarim Zare
Department of Chemistry, Payame Noor University, PO Box ۱۹۳۹۵-۳۶۹۷ Tehran, Iran
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