By Alan R. Katritzky
(from preface)Volume forty five of Advances in Heterocyclic Chemistry comprises 5 contributions, all of which holiday new floor for this sequence. within the first article, Fujita and Nagao describe using heterocycles for the induction of chirality. Thiscontribution represents an instance of ways during which our topic is making itself more and more felt through the entire box of chemistry. the second one article, via Tisler, covers heterocyclic quinones, together with the various sessions within which a heterocycle is fused to a 1,2- or 1,4-benzoquinone ring.In the 3rd article, Porter describes the chemistry of thiophenium salts and ylids, to which he has contributed largely. The chemistry of 1,4-diazocines is gifted by means of Perlmutter; this text follows an previous overview through a similar writer on azocines in quantity 31 of Advances in Heterocyclic Chemistry. the ultimate article of this quantity, and the second one contribution from Japan, is via Tsuge and Kanemasa and offers with contemporary advances in azomethine ylide chemistry.The cumulative index updates, as introduced within the preface to quantity forty, will conceal Volumes 41-45 and may look in quantity forty six. this may hinder a hold up within the booklet of quantity forty five.
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It showed high reactivity toward electron-rich dienes and trienes and the selectivities are discussed in terms of frontier molecular theory (8 1JA5211). Treatment of 2,3-bis(methylthiomethyl)-l,4-naphthoquinonewith methylamine gave as major product the benzo analog of 74 (8OJCS(P1)282). B. FURANDERIVATIVES Of the three isomeric furanoquinones (78-80), the vast majority of known quinones belongs to the p-quinonoid system (80). Representatives of the 5,6dione system (81) are practically unknown. Q2 0 0 67 0 0 Sec.
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