Advances in Heterocyclic Chemistry, Vol. 18 by A.R. Katritzky, A.J. Boulton (Eds.)

By A.R. Katritzky, A.J. Boulton (Eds.)

(from preface)The current quantity contains a wide variety of heterocyclic chemistry. Syntheses of heterocycles from thioureas are reviewed by means of T. S. Griffin, T. S. Woods, and I). L. Klayman, whereas eight. W. Schneller describes the chemistry of benzothiins and their derivatives (thiochromans. thiochromones, and thio-chromanones). advancements in chrom-3-ene chemistry are reviewed by way of L. Merlini. F. D. Popp contributes a bankruptcy at the isatins. A dialogue of theoretical elements of the tautomerism of pyrimidines, by way of J. S. Kwiatkowski and B. Pullman, follows up a corresponding prior contribution (Vol. thirteen) on tautomeric purines. within the ultimate bankruptcy P. and D. Cagniant describe the usual incidence ami synthesis of the bcnzofurans.

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520 S. K. Guha and J. N. Chatterjea, J . I n d i a n Chem. SOC. 24,473 (1947). 521 S. K . Guha, J. N. Chatterjea, and A. K. Mitra, Chem. Ber. 94, 2295 (1961). m 2 K. Hoelzle and E. S. Patent 2,463,225 (1948);Chem. Abstr. 43, 7706 511 (1949). C. Shinomiya and K. Yamada, Kogyo K a g a k u Zasshi 67, 146 (1964); Chem. Abstr. 61, 5819 (1964). 624 A. K. Sinha, J . I n d i a n Chem. SOC. 31,463 (1954). 523 Sec. 525I n the former case 187 is obtained, and in the latter 188. 4E8 Although isatin and 2-methylpyridine give mainly 175 and only a small amount of 190 (R = H), use of 6-methylinicotinic acid494and its ester472gave only 190 (R = CO,H and CO,Et, respectively).

43,9470 (1949). 520 S. K. Guha and J. N. Chatterjea, J . I n d i a n Chem. SOC. 24,473 (1947). 521 S. K . Guha, J. N. Chatterjea, and A. K. Mitra, Chem. Ber. 94, 2295 (1961). m 2 K. Hoelzle and E. S. Patent 2,463,225 (1948);Chem. Abstr. 43, 7706 511 (1949). C. Shinomiya and K. Yamada, Kogyo K a g a k u Zasshi 67, 146 (1964); Chem. Abstr. 61, 5819 (1964). 624 A. K. Sinha, J . I n d i a n Chem. SOC. 31,463 (1954). 523 Sec. 525I n the former case 187 is obtained, and in the latter 188. 4E8 Although isatin and 2-methylpyridine give mainly 175 and only a small amount of 190 (R = H), use of 6-methylinicotinic acid494and its ester472gave only 190 (R = CO,H and CO,Et, respectively).

327 D. J. l%aucr arid 1’. W. Sadler, British Patent 975,367 (1964);Chem. Abstr. 62, 323 324 6462 (1965). 11. J . lkaurr and P. W. S. Patent 3,253,991 (1966);Chern. Abstr. 65, 8683 (1966). 329 J. Bornstein, H. L. Yale, K. Losre, M. Hoking, J . Martins, and W. A. Lott, J . Arner. Chem. Soc. 73, 906 (1951). 330 N. P. Bun-Hoi, N. D. Xuong, and E’. Binon, J . Chem. , 713 (1956). 331 E. Campaigneand W. L. Archer,J. Amer. Chem. Soc. 74, 5801 (1952). 3 3 2 J . Daunis, It. Jacquicr, M. Rigail, and P. Viallofont, Bull.

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