- A Low Rhodium Content Smart Catalyst for Hydrogenation and Hydroformylation Reactions
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Abstract: This paper describes the preparation, broad characterization and study of activity in hydrogenation and hydroformylation reactions of an easily produced 0.18% Rh/Al2O3. Analytical studies on fresh and recycled samples shed light on the smart properties of such catalyst. Results showed high activity as well as fine/excellent chemoselectivity or regioselectivity, characteristics that may suggest a wide range of applicability. Graphic Abstract: The low metal content catalyst 0.18% Rh/Al2O3 was very active in both hydrogenation and hydroformylation reactions so providing intermediates for valuable APIs, as Nabumetone and Eletriptan, and a fragrance with a fresh, green-floral smell, that recalls scent of lily of the valley.[Figure not available: see fulltext.]
- Paganelli, Stefano,Tassini, Riccardo,Rathod, Vikas D.,Onida, Barbara,Fiorilli, Sonia,Piccolo, Oreste
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p. 1508 - 1521
(2020/10/15)
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- Investigational study into the formation of methoxy derivative and other impurities during the optimization of eletriptan hydrobromide
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During the process development of eletriptan hydrobromide, we have observed formation of an unknown impurity in the final product at enhanced levels which was identified as a methoxy substituted derivative on the side chain of the product. The present work involves detailed optimization studies directed toward the development of an efficient process for the commercial production of eletriptan hydrobromide substantially free from the methoxy impurity and other impurities.
- Kumar, U. Sampath,Sankar, V. Ravi,Rao, M. Malleswara,Jaganathan,Buchi Reddy
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p. 1917 - 1920
(2013/03/13)
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- Synthesis of compounds related to the anti-migraine drug eletriptan hydrobromide
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Eletriptan hydrobromide (1) is a selective serotonin (5-HT1) agonist, used for the acute treatment of the headache phase of migraine attacks. During the manufacture of eletriptan hydrobromide the formation of various impurities were observed and identified by LC-MS. To control the formation of these impurities during the preparation of active pharmaceutical ingredients, the structure of the impurities must be known. Major impurities of the eletriptan hydrobromide synthesis were prepared and characterized by using various spectroscopic techniques, i.e., mass spectroscopy, FTIR , 1H NMR, 13C NMR/DEPT, and further confirmed by co-injection in HPLC. The present study will be of great help in the synthesis of highly pure eletriptan hydrobromide related compounds.
- Madasu, Suri Babu,Vekariya, Nagaji Ambabhai,Hari Kiran,Gupta, Badarinadh,Islam, Aminul,Douglas, Paul S.,Babu, Korupolu Raghu
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p. 1400 - 1405
(2012/11/07)
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- 5-Alkyltryptamine derivatives as highly selective and potent 5-HT(1D) receptor agonists
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A series of 5-alkyltryptamines (6) and the corresponding conformationally constrained analogues (8) have been synthesized. The structure-activity relationships (SAR) at the 5-position of the indole skeleton and the ethylamine side chain have been studied.
- Slassi, Abdelmalik,Edwards, Louise,O'Brien, Anne,Meng, Charles Q.,Xin, Tao,Seto, Caroline,Lee, David K.H.,MacLean, Neil,Hynd, Donna,Chen, Cora,Wang, Hong,Kamboj, Rajender,Rakhit, Suman
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p. 1707 - 1709
(2007/10/03)
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- 5-ALKYL INDOLE COMPOUNDS
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Described herein are compounds selective for the 5-HT 1D-like receptor, which have the general formula: STR1 wherein: R 1 is linear or branched loweralkyl;R 2 is selected from a group of Formula II, III, IV and V: STR2 R 3 is selected from H and loweralkyl; R 4 is selected from H and loweralkyl; One of R. sup. 5 and R 6 is H and the other is independently selected from H, loweralkoxy, loweralkyl and hydroxy; andn is 1-3; or a salt, solvate or hydrate thereof.Also described is the use of these compounds as pharmaceuticals to treat indications where stimulation of the 5-HT 1D-like receptor is implicated, such as migraine.
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