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Novel and Environmentally Friendly Synthesis of Pimavanserin (5-HT2A Receptor)
Corresponding Author(s) : Naveen Mulakayala
Asian Journal of Chemistry,
Vol. 31 No. 3 (2019): Vol 31 Issue 3
Abstract
Eco-friendly synthesis of pimavanserin was developed from the key starting material 4-isobutoxy benzylamine in three different routes using water as solvent. These reactions provide an advantage of easy workup, good yields of products and uses water as the solvent. No column purification was required for the isolation of the product.
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- J.A. Santiago, V. Bottero and J.A. Potashkin, Front Aging Neurosci., 9, 394 (2017); https://doi.org/10.3389/fnagi.2017.00394.
- I. Chendo and J.J. Ferreira, Expert Opin. Pharmacotherap., 17, 2115 (2016); https://doi.org//10.1080/14656566.2016.1234609.
- M. Thygesen, N. Schlienger, B.-R. Tolf, F. Blatter and J. Berghausen, Salts of N-(4-Fluorobenzyl)-N-(1-methylpiperidin-4-yl)-N′-(4-(2-methylpropyloxy)phenylmethyl)carbamide and their Preparation, WO 2006036874 (2006).
- B.-R. Tolf, N. Schlienger and M. Thygesen, Synthesis of N-(4-Fluorobenzyl)-N-(1-methylpiperidin-4-yl)-N′-(4-(2-methylpropyloxy)-phenylmethyl)carbamide and its Tartrate Salt and Crystalline Forms, US Patent 20070260064 (2007).
- T.G. Gant and S. Sarshar, Substituted Ureas as 5-HT receptor Modulators and their Preparation and Use in the Treatment of Diseases, US Patent 20080280886 (2008).
- S.Wang, H. Wang, L. Zhao, Method for Synthesizing N-(4-Fluorobenzyl)-N-(1-methylpiperidine-4-yl)-N-(4-isobutoxybenzyl)urea tartrate, CN Patent 104961672 (2015).
- T. Biljan, J. Dogan, L. Metsger, S.M. Pipercic, M. Ratkaj, M.M. Skugor and Y. Wang, Processes and Intermediates for the Preparation of Pimavanserin, WO 2016141003 (2016).
- S. Radl, J. Stach, O. Klecan, J. Zezula, A Production Method of 1-(4-Fluorobenzyl)-3-(4-isobutoxybenzyl)-1-(1-methylpiperidin-4-yl)urea, WO 2017054786 (2017).
- Y. Lin, Z. Chen, J. Cheng, X. Zhao, L. Fan, Process for Preparation of Pimavanserin with Low Cost for Treating Parkinson’s Disease, CN Patent 107641097 (2018).
- M.R. Gudisela, P. Bommu, S. Navuluri and N. Mulakayala, Chemistry Select, 3, 7152 (2018); https://doi.org/10.1002/slct.201800948.
- R.K. Rapolu, M. Chavali, N. Mulakayala and V.N.K.V.P. Raju, Heterocycl. Lett., 8, 325 (2018).
- N. Mulakayala, Indian J. Adv. Chem. Sci., 4, 362 (2016).
References
J.A. Santiago, V. Bottero and J.A. Potashkin, Front Aging Neurosci., 9, 394 (2017); https://doi.org/10.3389/fnagi.2017.00394.
I. Chendo and J.J. Ferreira, Expert Opin. Pharmacotherap., 17, 2115 (2016); https://doi.org//10.1080/14656566.2016.1234609.
M. Thygesen, N. Schlienger, B.-R. Tolf, F. Blatter and J. Berghausen, Salts of N-(4-Fluorobenzyl)-N-(1-methylpiperidin-4-yl)-N′-(4-(2-methylpropyloxy)phenylmethyl)carbamide and their Preparation, WO 2006036874 (2006).
B.-R. Tolf, N. Schlienger and M. Thygesen, Synthesis of N-(4-Fluorobenzyl)-N-(1-methylpiperidin-4-yl)-N′-(4-(2-methylpropyloxy)-phenylmethyl)carbamide and its Tartrate Salt and Crystalline Forms, US Patent 20070260064 (2007).
T.G. Gant and S. Sarshar, Substituted Ureas as 5-HT receptor Modulators and their Preparation and Use in the Treatment of Diseases, US Patent 20080280886 (2008).
S.Wang, H. Wang, L. Zhao, Method for Synthesizing N-(4-Fluorobenzyl)-N-(1-methylpiperidine-4-yl)-N-(4-isobutoxybenzyl)urea tartrate, CN Patent 104961672 (2015).
T. Biljan, J. Dogan, L. Metsger, S.M. Pipercic, M. Ratkaj, M.M. Skugor and Y. Wang, Processes and Intermediates for the Preparation of Pimavanserin, WO 2016141003 (2016).
S. Radl, J. Stach, O. Klecan, J. Zezula, A Production Method of 1-(4-Fluorobenzyl)-3-(4-isobutoxybenzyl)-1-(1-methylpiperidin-4-yl)urea, WO 2017054786 (2017).
Y. Lin, Z. Chen, J. Cheng, X. Zhao, L. Fan, Process for Preparation of Pimavanserin with Low Cost for Treating Parkinson’s Disease, CN Patent 107641097 (2018).
M.R. Gudisela, P. Bommu, S. Navuluri and N. Mulakayala, Chemistry Select, 3, 7152 (2018); https://doi.org/10.1002/slct.201800948.
R.K. Rapolu, M. Chavali, N. Mulakayala and V.N.K.V.P. Raju, Heterocycl. Lett., 8, 325 (2018).
N. Mulakayala, Indian J. Adv. Chem. Sci., 4, 362 (2016).