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Diels-alder cycloaddition reactions of αβ-unsaturated aldehyde acylhydrazones

✍ Scribed by Sylvia J. Allock; Thomas L. Gilchrist; Frank D. King

Publisher
Elsevier Science
Year
1991
Tongue
French
Weight
232 KB
Volume
32
Category
Article
ISSN
0040-4039

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✦ Synopsis

Pyridine 9b was isolated in 92% yield and had np. 'te 1W19loC). 10 11 The phenylhydmzone. 2,4dinitrophenylhydrszone and tosylhydrazone of methacrolein also react with Nphenylmaleimide as 1-azadienes (experiments by S. J. Shuttlewotth).

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Diels-Alder Reactions of α,β-Unsaturated Thioesters and α,β-Unsaturated Selenoesters. -The regio-and exo/endo-selectivity of Diels-Alder reactions of thio-and selenoesters (II) with dienes is investigated. In general, thermal reactions show only low selectivities as expected. The selectivity improv