By A.R. Katritzky, A.J. Boulton (Eds.)
(from preface)The current quantity incorporates a wide selection of heterocyclic chemistry. Syntheses of heterocycles from thioureas are reviewed via 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 facets of the tautomerism of pyrimidines, by means 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 average prevalence ami synthesis of the bcnzofurans.
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Extra info for Advances in Heterocyclic Chemistry, Vol. 18
With ~ ~ *a~ ~10-fold ~ excess of cycloalkylaniines in ethanol in the presence of air, ring . ~ ~ ~ these same opening takes place to give 148 (R = ~ y c l o a l k y l )Under conditions other primary aliphatic amines gave purple gums which did not give crystalline p r o d n ~ t s . 441 This formation of aldehydcs from primary amines may, in part, explain some of the E. Giovannini and P. Portmann, HeZv. Chim. Acta 31, 1361 (1948). A. Schonberg, R. Moubasher, and A. Mostafa, J . Chem. Soc. 176 (1948).
Zh. 3 , 26 (1069);Chem. Ahstr. 71,30314 (1969). 394 1%. E. Hagenbach, E Hodcl, and 13. Gysin, Angew. Chem. 66, 359 (1964). S. Ioffe, A . €3. Tomchin, and E N. Zhukova, Zh. Obshch. Khzm. 39, 78 (1969). 39Q I. S Ioffe, A, R. Tomchin, and E. N. Zhukova, Zh. Obshch. lihz7n. 39, 640 (1969). 379 34 [Sec. C FRANK D. 333It is reported395that 108 exists as the thione in the crystalline state. , Nethorlancls I'atcnt 6,410,823 (1'365); Chem. Abstr. 63, 13295 (1965). 398 J . M. %. Gladych, It. Hornby, J. H.
5 (1947). 42 [Sec. 2 FRANK D. 452I n related reactions 2-aminoethylthi01,~~~ 3-aminopropylthi01,~~~ and ethanedit h i 0 1 react ~ ~ ~ to give spiro compounds, such as 160. 455a CN CN I I H ( 160a) P. DeMayo and J. J. Ryan, Chem. , 88 (1967). G. F. Field, Chem. , 886 (1969). 449 H. Brcderrck and G. Schmotzcr, Justus Liebigs A n n . Chem. 600,95 (1956). 450 F. D. Popp,J. Heteromycl. Chem. 11, 79 (1974). H. MeDougall ant1 S. H. Malik, J. Chem. SOC. C, 2044 (1969). 4 5 2 F. D. Popp and L. Maicr, unpnblished results.
Advances in Heterocyclic Chemistry, Vol. 18 by A.R. Katritzky, A.J. Boulton (Eds.)