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 features a wide selection 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 by way of L. Merlini. F. D. Popp contributes a bankruptcy at the isatins. A dialogue of theoretical facets of the tautomerism of pyrimidines, via 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 prevalence ami synthesis of the bcnzofurans.

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Chem. 4, 1027 (1970). 5291*A. Sec. 547 Replacement of the acetic anhydride b y propionic anhydride caused the reaction to make a different path, a n d three 0 O ) N Ac / az:-cxTD 0 ‘ (195) I I COEt COEt (196) geometric isomers of 196 were obtained. 548 X. Pfitzinger and Related Reactions As was noted in Section IX,R, isatin reacts with ketoncs under mildly basic conditions to give 171. Under stronger basic conditions, such as concentxatcd sodiiiiii or potassium hydroxide, the reaction takes a completely diffcrent coursc.

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