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
P290 investigation of solution stability of some 1,4-dihydropyridines
β Scribed by Kmetec, V.; Kristl, A.
- Book ID
- 123345007
- Publisher
- Elsevier Science
- Year
- 1994
- Tongue
- English
- Weight
- 141 KB
- Volume
- 2
- Category
- Article
- ISSN
- 0928-0987
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Conditions for bromination at the C3 and C5 positions of a 1,4-dihydropyridine (DHP) were investigated. The effect of base concentration, base type, reaction temperature, and solvent were examined. DHP derivatives with ester and amide moieties were synthesized and brominated. The bromine atoms can b
Photochemistry of Some 1,4-Dihydropyridine Derivatives. Part 1. -The photochemical behavior of some 1,4-dihydropyridine derivatives under argon and oxygen atmosphere is studied. The irradiation of (I) under oxygen yields the oxidation products (II). A rearrangement product (IV) and the trans-dimer