Abstract
An efficient method for oxidative cleavage of C(CO)–C bonds of ketones has been developed. This procedure enables activated methyl ketones to react with tetraethyl orthosilicate for generation of the corresponding methyl esters using copper as the catalyst. Primary mechanistic studies revealed that in contrary to other related studies, the involvement of the aldehyde as the intermediate of this reaction is highly probable. Interestingly, this study provides an unprecedented positive effect of the elemental sulfur upon this oxidative esterification reaction. As an application of our method, we have reported a two-step procedure for the synthesis of benzocaine. The second step of this procedure involves a highly selective reduction in nitro group in the presence of ester functionality.
Similar content being viewed by others
References
C. Zheng, S. Chang, C. Yang, D. Lian, C. Ma, C. Zhang, X. Fan, S. Xu, X. Sun, Tetrahedron 74, 2608 (2018)
Y. Wang, J. Huang, X. Xia, X. Peng, J. Saudi Chem. Soc. 22, 129 (2018)
B.T. Gillis, J. Org. Chem. 24, 1027 (1959)
M. Sharif, J. Chen, P. Langer, M. Beller, X.-F. Wu, Org. Biomol. Chem. 12, 6359 (2014)
L. Xu, S. Wang, B. Chen, M. Li, X. Hu, B. Hu, L. Jin, N. Sun, Z. Shen, Synlett 29, 1505 (2018)
P. Sathyanarayana, A. Upare, O. Ravi, P.R. Muktapuram, S.R. Bathula, RSC Adv. 6, 22749 (2016)
N.A. Angeles, F. Villavicencio, C. Guadarrama, D. Corona, E. Cuevas-Yanez, J. Braz. Chem. Soc. 21, 905 (2010)
X. Liu, H. Xu, Z. Ma, H. Zhang, C. Wu, Z. Liu, RSC Adv. 6, 27126 (2016)
P. Sathyanarayana, O. Ravi, P.R. Muktapuram, S.R. Bathula, Org. Biomol. Chem. 13, 9681 (2015)
H. Liu, M. Wang, H. Li, N. Luo, S. Xu, F. Wang, J. Catal. 346, 170 (2017)
X. Huang, X. Li, M. Zou, S. Song, C. Tang, Y. Yuan, N. Jiao, J. Am. Chem. Soc. 136, 14858 (2014)
W. Fan, Y. Yang, J. Lei, Q. Jiang, W. Zhou, J. Org. Chem. 80, 8782 (2015)
P. Subramanian, S. Indu, K.P. Kaliappan, Org. Lett. 16, 6212 (2014)
C. Tang, N. Jiao, Angew. Chem. Int. Ed. 53, 6528 (2014)
M. Wang, J. Lu, J. Ma, Z. Zhang, F. Wang, Angew. Chem. Int. Ed. 54, 14061 (2015)
B. Xu, Q. Jiang, A. Zhao, J. Jia, Q. Liu, W. Luo, C. Guo, Chem. Commun. 51, 11264 (2015)
L. Zhang, X. Bi, X. Guan, X. Li, Q. Liu, B.-D. Barry, P. Liao, Angew. Chem. Int. Ed. 125, 11303 (2013)
T.W. Hambley, C.L. Raston, A.H. White, Aust. J. Chem. 30, 1965 (1977)
S. Borah, M.S. Melvin, N. Lindquist, R.A. Manderville, J. Am. Chem. Soc. 120, 4557 (1998)
F.-T. Du, J.-X. Ji, Chem. Sci. 3, 460 (2012)
S. Rendler, M. Oestreich, Synthesis 2005, 1727 (2005)
S. Itoh, Curr. Opin. Chem. Biol. 10, 115 (2006)
L.M. Sayre, S.-J. Jin, J. Org. Chem. 49, 3498 (1984)
R. Lerebours, C. Wolf, J. Am. Chem. Soc. 128, 13052 (2006)
M.V. Klyuev, M.G. Abdullaev, Z. Abdullaeva, Pharm. Chem. J. 44, 446 (2010)
R.M. Mironenko, O.B. Belskaya, T.I. Gulyaeva, M.V. Trenikhin, V.A. Likholobov, Catal. Commun. 114, 46 (2018)
F.A. Westerhaus, R.V. Jagadeesh, G. Wienhofer, M.-M. Pohl, J. Radnik, A.-E. Surkus, J. Rabeah, K. Junge, H. Junge, M. Nielsen, A. Bruckner, M. Beller, Nat. Chem. 5, 537 (2013)
R.V. Jagadeesh, G. Wienhofer, F.A. Westerhaus, A.-E. Surkus, M.-M. Pohl, H. Junge, K. Junge, M. Beller, Chem. Commun. 47, 10972 (2011)
Acknowledgements
The authors are thankful to INSF (Grant Number: 95825781) and University of Hormozgan Research Council for the financial support.
Author information
Authors and Affiliations
Corresponding author
Electronic supplementary material
Below is the link to the electronic supplementary material.
Rights and permissions
About this article
Cite this article
Roodan, S.M., Ghaderi, A. Copper-catalyzed demethylative esterification of arylmethylketones: a new route for the synthesis of benzocaine. J IRAN CHEM SOC 16, 2327–2332 (2019). https://doi.org/10.1007/s13738-019-01698-z
Received:
Accepted:
Published:
Issue Date:
DOI: https://doi.org/10.1007/s13738-019-01698-z