TY - JOUR
T1 - Co-catalyst and solvent free nitrogen rich triazole based organocatalysts for cycloaddition of CO2 into epoxide
AU - Suleman, Suleman
AU - Younus, Hussein A.
AU - Khattak, Zafar A.K.
AU - Ullah, Habib
AU - Elkadi, Mirella
AU - Verpoort, Francis
PY - 2020/9
Y1 - 2020/9
N2 - A general synthesis of triazole-based catalysts remains a significant challenge. Consequently, triazole-based catalysts are rarely studied. Herein, the first report is presented for the construction of cyclic carbonates using triazole-based organocatalysts, which is a crucial technology to a genuinely sustainable and atom-efficient economy. A series of triazole-based organocatalysts was synthesized, entirely characterized by FTIR, NMR, mass spectrometry, and elemental analysis. This work is mainly based on the construction of nucleophilic-electrophilic bifunctional catalysts (N-rich triazole ring-carboxylic group) combined with substituents, which evaluate the vital effect of substituents for the catalytic cycloaddition reaction of CO2 into epoxide. In general, various systems required the Lewis basic site in the form of cocatalyst or solvent to be optimally effective. However, our designed catalyst contained Lewis basic and acidic sites. It, therefore, can catalyze the reaction proficiently without the aid of solvent, cocatalysts and can perform at ambient pressure of CO2 (1 bar) to produce different cyclic carbonates. Moreover, the catalyst is reusable, maintaining the same activity along with remarkable catalyst stability.
AB - A general synthesis of triazole-based catalysts remains a significant challenge. Consequently, triazole-based catalysts are rarely studied. Herein, the first report is presented for the construction of cyclic carbonates using triazole-based organocatalysts, which is a crucial technology to a genuinely sustainable and atom-efficient economy. A series of triazole-based organocatalysts was synthesized, entirely characterized by FTIR, NMR, mass spectrometry, and elemental analysis. This work is mainly based on the construction of nucleophilic-electrophilic bifunctional catalysts (N-rich triazole ring-carboxylic group) combined with substituents, which evaluate the vital effect of substituents for the catalytic cycloaddition reaction of CO2 into epoxide. In general, various systems required the Lewis basic site in the form of cocatalyst or solvent to be optimally effective. However, our designed catalyst contained Lewis basic and acidic sites. It, therefore, can catalyze the reaction proficiently without the aid of solvent, cocatalysts and can perform at ambient pressure of CO2 (1 bar) to produce different cyclic carbonates. Moreover, the catalyst is reusable, maintaining the same activity along with remarkable catalyst stability.
KW - Carbon dioxide
KW - Cyclic carbonates
KW - Cyclo addition
KW - Homogeneous catalysis
KW - Organocatalysts
UR - http://www.scopus.com/inward/record.url?scp=85088021961&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85088021961&partnerID=8YFLogxK
U2 - 10.1016/j.mcat.2020.111071
DO - 10.1016/j.mcat.2020.111071
M3 - Article
AN - SCOPUS:85088021961
VL - 493
JO - Molecular Catalysis
JF - Molecular Catalysis
SN - 2468-8231
M1 - 111071
ER -