1H-Pyrrolo[2,3-c]pyridine (cas: 271-29-4) belongs to indole derivatives. Indole exists overwhelmingly in the 1H-indole form as do other simple indoles.Indole was synthesized in moderate yield via an o-naphthoquinone catalyzed tandem cross-coupling of substituted aniline and benzylamine under aerobic oxidation conditions.Synthetic Route of C7H6N2
Pyrroles from azaindoles. A synthesis of porphobilinogen was written by Frydman, Benjamin;Despuy, Maria E.;Rapoport, Henry. And the article was included in Journal of the American Chemical Society in 1965.Synthetic Route of C7H6N2 This article mentions the following:
The synthesis of porphobilinogen in 19% overall yield from 2-methoxy-4-methyl-5-nitropyridine (I) is described. I, m.p. 81掳 位 289 m渭 (蔚 6800), was prepared by treating the chloro derivative with methanolic NaOMe. I with C2H5OK and di-Et oxalate gave 93% yield of ethyl 2-methoxy-5-nitro-4-pyridinepyruvate (II), m.p. 97-98掳, 位 287 m渭 (蔚 10,100), 未 7.8 (H-3), 9.1 (H-6), and 7.2 (CH:C(OH)COOR). Hydrogenation of II over Pd-C catalyst and cyclization gave 85% yield of ethyl 5-methoxy-6-azaindole-2-carboxylate (III), m.p. 103-106掳, 位 278 m渭 (蔚 15,000), 287 (17,000), 344 (3600), 未 7.1, 7.2(H-3, H-4), and 8.7 (H-7). Hydrogenation with Pt catalyst yielded III and a substantial amount of 1,2,3,4-tetrahydro-3-hydroxy-6-methoxy-1,7-naphthyridin-2-one, m.p. 215掳 from C2H5OH, 位 248 m渭 (14,070), 未 (in CF3COOH) 3.1 (H-4 脳 2), 4.5 (H-3), 7.0 (H-5) and 8.5 (H-8). III with Me2NH and paraformaldehyde yielded ethyl 3-dimethylaminomethylene-5-methoxy-6-azaindole-2-carboxylate (IV) di-HCl salt, m.p. 162掳 位 283 m渭 (蔚 12,100), 292 (13,800), 347 (3700), 未 (D2O) 8.2 (H-7). IV with di-Et sodiomalonate gave the corresponding malonate (V) HCl, m.p. 188掳 位 (蔚 18,600), 294 (20,400), 350 (4600). V was readily converted to 2-methoxy-3-propionic acid-6-azaindole (VI), m.p. 210-215掳, 位 283 m渭 (蔚 13,000), 292 (15,700), 350 (4400). VI on heating at 150掳 with 48% HBr yielded 70% of 2-carboxy-5-oxo-5,6-dihydro-1-H-pyrrolo[2,3-c]pyridine-3-propionic acid (VII), m.p. 280掳 dec., 位 292 m渭 (蔚 4200) and 302 (4400). VII with Pd-C and H in aqueous solution at pH 7 yielded 2-carboxyporphobilinogen lactam in 90% yield, m.p. 295掳 位 276 m渭 (蔚 12,600). In boiling water porphobilinogen lactam (VIII), m.p. 295掳 dec., was obtained in 80% yield. VIII with 2N KOH at 20掳 for 72 hrs. yielded 85% of porphobilinogen hydrate, m.p. 167掳. A similar series of reactions was carried out starting with 2-benzyloxy-4-methyl-5-nitropyridine rather than I. All uv determinations are in EtOH. In the experiment, the researchers used many compounds, for example, 1H-Pyrrolo[2,3-c]pyridine (cas: 271-29-4Synthetic Route of C7H6N2).
1H-Pyrrolo[2,3-c]pyridine (cas: 271-29-4) belongs to indole derivatives. Indole exists overwhelmingly in the 1H-indole form as do other simple indoles.Indole was synthesized in moderate yield via an o-naphthoquinone catalyzed tandem cross-coupling of substituted aniline and benzylamine under aerobic oxidation conditions.Synthetic Route of C7H6N2
Referemce:
Indole alkaloid derivatives as building blocks of natural products from聽Bacillus thuringiensis聽and聽Bacillus velezensis聽and their antibacterial and antifungal activity study,
Preparation of Indole Containing Building Blocks for the Regiospecific Construction of Indole Appended Pyrazoles and Pyrroles