By A.R. Katritzky, A.J. Boulton (Eds.)
(from preface)The current quantity incorporates a wide variety of heterocyclic chemistry. Syntheses of heterocycles from thioureas are reviewed through 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 via L. Merlini. F. D. Popp contributes a bankruptcy at the isatins. A dialogue of theoretical features 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 typical incidence ami synthesis of the bcnzofurans.
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Additional info for Advances in Heterocyclic Chemistry, Vol. 18
Rev. 50,261 (1952). 434 435 Sec. 21 41 THE CHEMISTRY O F ISATIN results noted above in the reactions of isatin with an excess of primary aliphatic amines. 4 3 y 0 0 n N L N - ( ” - N H MI1 e lNH :XI& NH ‘ /. H N / 0 \ R 0 \ (150) (151) (152) Isatin and N-methylisatin can be reacted with ammonia t o give an imine (151). With methyl isocyanstc> these imines give 152 (R = CONHMe arid Jlc, rcspcctivcly) 123 Oxidation of the imine 151 (It = H) with hydrogen peroxide in aqueous ammonia. 445,446 In 1967 structure 156 was suggested for 442 443 444 445 446 G.
H i m . ) (1948). 5 7 6 N. 1'. Riiii-Hoi a n i l 1C. r, i I u 1 1 . ,Yoc. ( ' / i i t a . ,374 (1946). 1'.
S. K. Guha, K. n. Bancrji, and K. K. Sen, J . I n d ~ a nCIiern. 50, 264 (1973). 420 G. Hanseke and W. Lemkc, Cheni. Ber. 91, 101 (1958). 4Z0a N. P. Bun-Hoi, G. Stunt-Nuf, and J. C. Arcos, Bull. Chzm. , 838 418 418 (1969). N. P. Bu~i-Iloi and G. Saint-Ituf, Bull. , 1920 (1960). 4 2 2 E. M. Gal, Ezperzentia 7,261 (1951). 423 I. Shopov, Izv. Otd. Khim. Nauki, Bulg. Akad. Nauk. 3, 47 (1970); Chern. 421 424 Abstr. 74, 32028 (197 1). I. Shopov and N. Popov,J. Polym. , Part A - 1 7, 1803 (1969). Sec.