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Mohsenzadeh Farshid Darabi Hossein Reza Alivand Mahsa Aghapoor Kioumars Balavar Yadollah 《Research on Chemical Intermediates》2020,46(12):5255-5262
Research on Chemical Intermediates - In this study, common naturally occurring organic acids, namely oxalic, malonic, succinic, tartaric and citric acid (as safe, inexpensive, and biodegradable... 相似文献
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Kioumars Aghapoor Farshid Mohsenzadeh Shiva Talebian Mohammad Jafar Tehrani Yadollah Balavar Golriz Khanalizadeh Hossein Reza Darabi 《Monatshefte für Chemie / Chemical Monthly》2011,35(1):619-624
Abstract
The role of vitamin B1 as a catalyst is investigated for the quinoxaline ring condensation under various mild reaction conditions. The results revealed that the combination of vitamin B1 and ultrasonic irradiation promotes the reaction more efficiently. The salient features of this environmentally benign method are fast conversions, excellent yields for a wide range of substrates, and the use of a low-cost, readily available, nontoxic, and metal-ion-free natural catalyst. The wide range of turnover frequency values (6–400 h−1) shows that the reaction rate is highly dependent on the nature of the functional groups on the aromatic ring of substrates. Moreover, a plausible mechanism for the catalytic action of vitamin B1 has been introduced. 相似文献4.
Kioumars Aghapoor Farshid Mohsenzadeh Hossein Reza Darabi Hani Sayahi Yadollah Balavar 《Research on Chemical Intermediates》2016,42(2):407-415
A simple, clean, and efficient solvent-free protocol is introduced for Paal–Knorr pyrrole synthesis catalyzed by l-tryptophan as a thermally resistant, natural primary amino acid. The products were obtained mostly in excellent yields through the reaction of hexane-2,5-dione with aromatic primary amines bearing a variety of substituents. The catalyst could be easily isolated from the reaction mixture and recycled at least six times without significant loss of activity. The procedure has an environmentally benign nature in agreement with the concepts of green chemistry. 相似文献
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Kioumars Aghapoor Hossein Reza Darabi Farshid Mohsenzadeh Yadollah Balavar Hesam Daneshyar 《Transition Metal Chemistry》2010,35(1):49-53
Abstract
Among the various transition metal chlorides, zirconium(IV) chloride was found to be an efficient catalyst for the rapid synthesis of a wide range of 2,3-dialkyl- and 2,3-diaryl-quinoxaline and pyrido[2,3-b]pyrazine derivatives in excellent yields at room temperature. The remarkable features of this catalytic process are the mild reaction conditions, quantitative yields, short reaction times, high conversions, tolerability of various functional groups, clean reaction profiles, and operational simplicity. 相似文献
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