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Literature examples of 3-amino-1H-pyrrole-2-carboxylates being used as precursors to heterocycles: (a) Niitsuma, S.; Kato, K.; Takita, T.; Umezawa, H. Tetrahedron Lett. 1985, 26, 5785-5786.
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(e) Monge, A.; Aldana, I.; Font, M.; Arraras, J. A.; Santiago, E.; Lopez-Unzu, M. J.; Martinez de Irujo, J. J.; Alberdi, E.; Fernandez-Alvarez, E. Arch. Pharm. (Weinheim, Ger.) 1992, 325, 439-452.
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Other similar approaches are: (a) Lim, M.-I.; Klein, R. S. and Fox, J. J. J. Org. Chem. 1979, 44, 3826-3829.
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16
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(a) Furukawa, M., Okawara, T., Noguchi, Y. and Terawaki, Y. Chem. Pharm. Bull. 1979, 27, 2223-2226.
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(b) Birnberg, G. H., Fanshawe, W. J., Francisco, G. D. and Epstein, J. W. J. Heterocycl. Chem. 1995, 32, 1293-1298.
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(a) Carlson, R., Nilsson, A. and Stroemqvist, M. Acta Chem. Scand. 1983, B37, 7-13.
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(a) Erdmann, B.; Knoll, A. and Liebscher, J. J. Prakt. Chem. 1988, 330, 1015-1021.
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22
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0029933816
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In a similar process, Elliott and co-workers also reported obtaining a pyrrole directly from the addition of diethyl aminomalonate to ethyl (ethoxymethylene)cyanoacetate. See: Elliott, A. J.; Montgomery, J. A.; Walsh, D. A. Tetrahedron Lett. 1996, 37, 4339-4340.
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Elliott, A.J.1
Montgomery, J.A.2
Walsh, D.A.3
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23
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0342741346
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note
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b). formula presented
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