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Photodimerization of some α,β-unsaturated lactams

✍ Scribed by Edward C. Taylor; W.W. Paudler

Book ID
104249874
Publisher
Elsevier Science
Year
1960
Tongue
French
Weight
137 KB
Volume
1
Category
Article
ISSN
0040-4039

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✦ Synopsis

TEE dinrrisation of activated olefins by irradiation with ultraviolet light is one of the oldest and most widely-studied reactions in photochemistry. 2~3 There axe, however, no reports of the action of ultraviolet light on a,Ounsaturated lactams. Xe wish to report that N-methyl-2-pyridone (b.p. 121"/ 105111 xz302~.

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An enantioselective synthesis of a,b-unsaturated gand d-lactams was proposed based on a simple strategy using the initial preparation of cis vinylogous aminoesters by the Horner reaction followed by a mild intramolecular cyclisation.