344790-96-1Relevant articles and documents
In search of simplicity and flexibility: A rational access to twelve fluoroindolecarboxylic acids
Schlosser, Manfred,Ginanneschi, Assunta,Leroux, Frederic
, p. 2956 - 2969 (2007/10/03)
All twelve indolecarboxylic acids 1-12 carrying both a fluorine substituent and a carboxy group at the benzo ring have been prepared either directly from the corresponding fluoroindoles 13-16 or from the chlorinated derivatives 22, 23 and 25 by hydrogen/metal permutation ("metalation"), or from the bromo- or iodofluoroindoles 17-20 and 26, 27, 29 and 30 by halogen/metal permutation, the organometallic intermediate being each time trapped with carbon dioxide. In most, though not all cases, the nitrogen atom in the five-membered ring had to be protected by a trialkylsilyl group. Some of the bromo- or iodofluoroindoles (26 and 27) were successfully subjected to a basicity gradient-driven selective migration of the heavy halogen. An unexpected finding on the way to the target compounds were the rigorously site-selective metalation of the 5-fluoro-N-(trialkylsilyl)indole (14b; exclusive deprotonation of the 4-position). The fluoroindoles 13-16, although previously known, were accessed more conveniently from suitably substituted nitrobenzenes using the Bartoli or the Leimgruber-Batcho method. A new and very attractive indole synthesis was elaborated consisting of the ortho-lithiation of an N-acyl-protected aniline followed by ortho-formylation, Wittig chloromethylenation and base-catalyzed cyclization accompanied by dehydrochlorination. These five consecutive steps can be contracted to a convenient one-pot protocol. Wiley-VCH Verlag GmbH & Co. KGaA, 2006.
A novel fluorinated tryptamine with highly potent serotonin 5-HT1A receptor agonist properties
Laban, Uros,Kurrasch-Orbaugh, Deborah,Marona-Lewicka, Danuta,E. Nichols, David
, p. 793 - 795 (2007/10/03)
Synthesis and biological evaluation of a novel fluorinated tryptamine analogue are described. This new compound 1-(4-fluoro-5-methoxyindol-3-yl)pyrrolidine (2) was found to be a potent serotonin 5-HT1A agonist.