RSC Advances
Paper
times, and lower reaction temperatures. Also, the catalyst was 19 H.-J. Yoon, S.-M. Lee, J.-H. Kim, H.-J. Cho, J.-W. Choi,
revealed to be environmentally friendly and could be reused
a number of times without loss of activity and selectivity.
S.-H. Lee and Y.-S. Lee, Tetrahedron Lett., 2008, 49, 3165–
3171.
20 S. A. Taghavi, M. Moghadam, I. Mohammadpoor-Baltork,
S. Tangestaninejad, V. Mirkhani and A. R. Khosropour,
Inorg. Chim. Acta, 2011, 377, 159–164.
Conflicts of interest
21 A. Kamal, M. N. A. Khan, K. S. Reddy, Y. V. V. Srikanth and
T. Krishnaji, Tetrahedron Lett., 2007, 48, 3813–3818.
22 V. Mirkhani, S. Tangestaninejad, M. Moghadam,
B. Yadollahi and L. Alipanah, Monatsh. Chem., 2004, 135,
1257–1263.
23 F. Rajabi, Tetrahedron Lett., 2009, 50, 395–397.
24 F. Shirini, M. A. Zolgol and M. Abedini, Monatsh. Chem.,
2004, 135, 279–282.
25 J. R. Satam and R. V. Jayaram, Catal. Commun., 2008, 9,
2365–2370.
26 P. Laszlo, Acc. Chem. Res., 1986, 19, 121–127.
27 F. Bigi, S. Carloni, R. Maggi, C. Muchetti and G. Sartori, J.
Org. Chem., 1997, 62, 7024–7027.
The authors declare no competing nancial interest.
Acknowledgements
We acknowledge the nancial support from South African NRF
(Grant specic number 117997 and 111710), Analytical division
(spectrum), Sasol R&D and research fund from the University of
Johannesburg. We would also like to acknowledge Mr D. Hariss
and Dr R. Meyer from Shimadzu South Africa for the usage of
their equipment throughout this study.
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16476 | RSC Adv., 2021, 11, 16468–16477
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