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Intramolecular cyclization of 4-aryl-1,4-dihydropyridine acetals

✍ Scribed by George D. Hartman; Brian T. Phillips; James P. Springer; Jordan Hirshfield


Book ID
112128712
Publisher
Journal of Heterocyclic Chemistry
Year
1987
Tongue
English
Weight
200 KB
Volume
24
Category
Article
ISSN
0022-152X

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On irradiation at Ξ» Υ† 270 nm solutions of 4-aryl-1,4-Irradiation with filtered light (Ξ» ΟΎ 313 nm) leads to syn and anti dimers 4 and 3 in nearly equal yields. The poor yields of dihydropyridines 1 yield cage dimers 2 as the main products beside small amounts of anti dimers 3. 1 H-NMR data and X-anti