✦ LIBER ✦

Novel solid-state synthesis of dimeric 4-aryl-1,4-dihydropyridines

✍ Scribed by Andreas Hilgeroth; Frank W. Heinemann

Book ID: 102339346
Publisher: Journal of Heterocyclic Chemistry
Year: 1998
Tongue: English
Weight: 466 KB
Volume: 35
Category: Article
ISSN: 0022-152X
DOI: 10.1002/jhet.5570350217

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✦ Synopsis

Abstract

On irradiation in the solid state the 4‐aryl‐1,4‐dihydroypridines 1 undergo [2+2] cycloadditon to centrosymmetric head‐to‐tail dimers 3 and 4a. The almost exclusive formation of the cage dimers 3 via the C~2~‐symmetric syn‐dimers 2 takes place in nearly quantitative yields, in contrast with the cycloaddition reaction of the anti‐dimer 4a, which is accompanied by photooxidation to pyridine 5a.

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