A. R. & Boulton, A. J. [Eds]. Katritzky's Advances in Heterocyclic Chemistry, Vol. 19 PDF

By A. R. & Boulton, A. J. [Eds]. Katritzky

ISBN-10: 0120206196

ISBN-13: 9780120206193

The current quantity involves 4 chapters. the 1st (by Ollis and Ramsden) classifies and discusses the chemistry of that fascinating crew of compounds referred to as meso-ionic heterocycles and contains a precious basic definition of the time period. the second one bankruptcy (Litvinov and Gol'dfarb) bargains with platforms with (or extra) thiophene (or selenophene) jewelry at once fused jointly. The 1,2,3-triazines, in addition to the better-known 1,2,3-benzotri-azines and different fused 1,2,3-triazine platforms, are mentioned within the 3rd bankruptcy, through Kobylecki and McKillop. within the final bankruptcy George, Khetan, and Gupta deal with heterocyclic syntheses which contain the addition of nucleo-philic reagents to acetylenic esters.

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A. Almeter, D. S. Johnson, S. M. Roblyer, and T. C. Rosenthal, J. Heferocycl. Chem. 7 , 671 (1970). (a) P. B. Talukdar, S. K. Sengupta, and A. K. Datta, Indian J. Chem. 9, 179 (197 1) [CA 75, 2 7 5 6 1 ~(1971)l; (b) 9, 1018 (1971). 143 W. D. OKs and C. A. Ramsden, Chem. , 1224 (1971); J. Chem. , Perkin Trans. I, 638 (1974). lU E. Kiihle, B. Anders, and G. Zumach. Angew. , Znr. Ed. Engl. 6,649 (1967). 46 W. D. OLLIS AND C. A. RAMSDEN [Sec. This method has been used to synthesize pairs of isomers (216 and 217), and their equilibration (216 % 217) in boiling ethanol has been r e ~ 0 r t e d .

THIAZOLES 1. 65 A second route to meso-ionic 1,3-thiazol-5-ones(105) is provided by 1,3-dipolar cycloaddition. 44962 6 R' R2 -N,+ R' o- kS R2-N"COZH R3 (105) R' ks ] RZ- N p O E t BF4R3 1106) (107) The meso-ionic 1,3-thiazol-5-ones(105) show an interesting range of reactions. ~~ 2. "~ s4A. Lawson and C. E. Searle, J. Chem. , 1556 (1957). 65 M. Ohta, H. -G. Ichimura, N i p p n Kagaku Zasshi 85,440 (1964) [CA 61, 14657h (1964)l; M. Ohta and C. Shin,Bull. Chem. Jap. 38, 704 (1965). 66 K. T. Potts, E.

Fis. Mat. Nat. 28, 646 (1960) [CA 55, 9382c (1961)l. G. D. Andreetti, G. Bocelli, L. Cavalca, and P. Sgarabotto, Guzz. Chim. Itul. 102, 23 (1972) [CA 77, 10803t (1972)l. Ils(a) H. , 1277, ‘1281 (1971); Chem. Ber. 105, 188, 196 (1972); (b) A. Alemagna and T. Bacchetti, Chim. Znd. (Milan) 54, 1105 (1972) [CA 78,97561e (1973)l; (c) A. Holm, N. Harrit, K. Bechgaard, 0. Buchardt, and S. E. Harnung, J. Chem. ,Chern. , 1125 (1972). ‘I6 38 W. D. OLLIS AND C. A. RAMSDEN [Sec. G The meso-ionic 1,3,2-oxathiazol-5-ones (169) show an interesting range of reactions with nucleophiles including ammonia, primary amines, and aqueous alkali.

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Advances in Heterocyclic Chemistry, Vol. 19 by A. R. & Boulton, A. J. [Eds]. Katritzky

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