Synthesis and isolation of bromo-β-carbolines obtained by bromination of β-carboline alkaloids
β-Carbolines (1-5) undergo electrophilic aromatic substitution with N-bromosuccinimide under different experimental conditions. Although 6-bromo-nor-harmane (1a) obtained by bromination of nor-harmane (1) was isolated and fully characterized sometime ago, the other bromoderivatives of nor-harmane (1...
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HeteroCorporation
2001
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| Acceso en línea: | Registro en Scopus DOI Handle Registro en la Biblioteca Digital |
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| LEADER | 06600caa a22008177a 4500 | ||
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| 001 | PAPER-2120 | ||
| 003 | AR-BaUEN | ||
| 005 | 20230518203130.0 | ||
| 008 | 190411s2001 xx ||||fo|||| 00| 0 eng|d | ||
| 024 | 7 | |2 scopus |a 2-s2.0-0034752140 | |
| 040 | |a Scopus |b spa |c AR-BaUEN |d AR-BaUEN | ||
| 030 | |a JHTCA | ||
| 100 | 1 | |a Ponce, M.A. | |
| 245 | 1 | 0 | |a Synthesis and isolation of bromo-β-carbolines obtained by bromination of β-carboline alkaloids |
| 260 | |b HeteroCorporation |c 2001 | ||
| 270 | 1 | 0 | |m Erra-Balsells, R.; Departamento de Quimica Organica, Fac. de Ciencias Exactas y Naturales, Universidad de Buenos Aires, 3 Ciudad Universitaria, 1428 Buenos Aires, Argentina |
| 506 | |2 openaire |e Política editorial | ||
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| 504 | |a Tanaka, K., Nonami, H., Fukuyama, Y., Erra-Balsells, R., (1998) Proceedings of the 46th ASMS Conference on Mass Spectrometry and Allied Topics, , Orlando, Florida, May 31 - June 4 | ||
| 504 | |a Ponce, M.A., Erra-Balsells, R., Synthesis and isolation of nitro-βcarbolines obtained by nitration of commercial β-carboline alkaloids J. Heterocyclic Chem., , submitted | ||
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| 504 | |a Satish Goud, B., Desiraju, G.R., (1995) J. Chem. Res. (S), p. 244 | ||
| 504 | |a Sarma, J.A.R.P., Nagaraju, A., (2000) J. Chem. Soc., Perkin Trans. 2, p. 1113 | ||
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| 504 | |a Kauffmann, T., (1965) Angew. Chem. Int. Ed., 4, p. 543 | ||
| 504 | |a Kohen Cohen, C.C., Ponce, M.A., Erra-Balsells, R., unpublished results; Sarma, J.A.R.P., Nagaraju, A., Majumdar, K.K., Samiel, P.M., Das, I., Roy, S., McGhie, A.J., (2000) J. Chem. Soc., Perkin Trans. 2, p. 1119 | ||
| 504 | |a (1996) HyperChem TM 5.1 Suite, , Hypercube, Ontario | ||
| 520 | 3 | |a β-Carbolines (1-5) undergo electrophilic aromatic substitution with N-bromosuccinimide under different experimental conditions. Although 6-bromo-nor-harmane (1a) obtained by bromination of nor-harmane (1) was isolated and fully characterized sometime ago, the other bromoderivatives of nor-harmane (1b-1e) and harmane (2a-2e) were partially described as part of the reaction mixtures. The preparation and subsequent isolation, purification and full characterization of 1b, 1c, 1d, 1e, 2a, 2b, 2c, 2d, 2e are reported (mp, Rf, 1H-nmr, 13C-nmr and ms) together with the preparation, isolation and charaterization, for the first time, of the bromoderivatives obtained from harmine (3a-3e), harmol (4a, 4b) and 7-acetylharmol (5a-5c). As brominating reagent N-bromosuccinimide and N-bromosuccinimide-silica gel in dichloromethane and in chloroform as well as the β-carboline - N-bomosuccinimide solid mixture have been used and their uses have been compared. Semiempirical AM1 and PM3 calculations have been performed in order to predict reactivity in terms of the energies of HOMO, HOMO-LUMO difference and in terms of the charge density of β-carbolines (1-5) and bromo-β-carbolines (1a-1e, 2a-2e, 3a-3e, 4a, 4b, 5a, 5b and 5c) (Scheme 1). Theoretical and experimental results are discussed briefly. |l eng | |
| 593 | |a Departamento de Quimica Organica, Fac. de Ciencias Exactas y Naturales, Universidad de Buenos Aires, 3 Ciudad Universitaria, 1428 Buenos Aires, Argentina | ||
| 690 | 1 | 0 | |a CARBOLINE DERIVATIVE |
| 690 | 1 | 0 | |a REAGENT |
| 690 | 1 | 0 | |a ARTICLE |
| 690 | 1 | 0 | |a BROMINATION |
| 690 | 1 | 0 | |a CALCULATION |
| 690 | 1 | 0 | |a CHEMICAL ANALYSIS |
| 690 | 1 | 0 | |a CHEMICAL STRUCTURE |
| 690 | 1 | 0 | |a DENSITY |
| 690 | 1 | 0 | |a ELECTRICITY |
| 690 | 1 | 0 | |a ENERGY |
| 690 | 1 | 0 | |a GEOMETRY |
| 690 | 1 | 0 | |a ISOLATION AND PURIFICATION |
| 690 | 1 | 0 | |a PURIFICATION |
| 690 | 1 | 0 | |a REACTION ANALYSIS |
| 700 | 1 | |a Erra-Balsells, R. | |
| 773 | 0 | |d HeteroCorporation, 2001 |g v. 38 |h pp. 1087-1095 |k n. 5 |p J. Heterocycl. Chem. |x 0022152X |w (AR-BaUEN)CENRE-780 |t Journal of Heterocyclic Chemistry | |
| 856 | 4 | 1 | |u https://www.scopus.com/inward/record.uri?eid=2-s2.0-0034752140&doi=10.1002%2fjhet.5570380512&partnerID=40&md5=61525ac7cbe13621488e9581835406f5 |y Registro en Scopus |
| 856 | 4 | 0 | |u https://doi.org/10.1002/jhet.5570380512 |y DOI |
| 856 | 4 | 0 | |u https://hdl.handle.net/20.500.12110/paper_0022152X_v38_n5_p1087_Ponce |y Handle |
| 856 | 4 | 0 | |u https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_0022152X_v38_n5_p1087_Ponce |y Registro en la Biblioteca Digital |
| 961 | |a paper_0022152X_v38_n5_p1087_Ponce |b paper |c PE | ||
| 962 | |a info:eu-repo/semantics/article |a info:ar-repo/semantics/artículo |b info:eu-repo/semantics/publishedVersion | ||
| 963 | |a VARI | ||
| 999 | |c 63073 | ||