By A. R. & Boulton, A. J. [Eds]. Katritzky
The current quantity includes 4 chapters. the 1st (by Ollis and Ramsden) classifies and discusses the chemistry of that fascinating team of compounds referred to as meso-ionic heterocycles and features a important common definition of the time period. the second one bankruptcy (Litvinov and Gol'dfarb) offers with platforms with (or extra) thiophene (or selenophene) jewelry without delay fused jointly. The 1,2,3-triazines, besides the better-known 1,2,3-benzotri-azines and different fused 1,2,3-triazine platforms, are mentioned within the 3rd bankruptcy, via 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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Additional resources for Advances in Heterocyclic Chemistry, Vol. 19
They show a remarkable degree of reactivity toward simple a l k e n e ~in-~ ~ cluding tetramethylethylene, cyclopentene, norbornene, and norbornadiene as well as toward the more reactive 1,3-dipolarophilicolefins: dimethyl maleate, dimethyl fumarate, methyl cinnamate, dibenzoylethylene, N-phenylmaleimide, and acenaphthylene. A l k y n e ~ ~ ' . ~ ~ such as dimethyl acetylenedicarboxylate also add to meso-ionic 1,3dithiol-4-ones (134), but the intermediate cycloadducts are not isolable: they eliminate carbonyl sulfide and yield thiophenes (137) d i r e ~ t l y .
Potts and U. P. Sigh, Chem. , 569 (1969). H. Gotthardt and B. Christl, Terruhedron Lea.. 4743 (1968). Sec. p. 96 D, benzene) is in accord with its meso-ionic formulation. ~~ dipolar cycloaddition reactions giving adducts of the general type 136. They show a remarkable degree of reactivity toward simple a l k e n e ~in-~ ~ cluding tetramethylethylene, cyclopentene, norbornene, and norbornadiene as well as toward the more reactive 1,3-dipolarophilicolefins: dimethyl maleate, dimethyl fumarate, methyl cinnamate, dibenzoylethylene, N-phenylmaleimide, and acenaphthylene.
Aryl isocyanide dichlorides (218)144and G. W. Evans and B. Milligan, Ausr. J. Chem. 20, 1779 (1967); R. F. Smith, J. L. Deutsch, P. 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.
Advances in Heterocyclic Chemistry, Vol. 19 by A. R. & Boulton, A. J. [Eds]. Katritzky
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