中文名称 | 英文名称 | CAS号 | 化学式 | 分子量 |
---|---|---|---|---|
—— | 4-(neopentyloxy)benzonitrile | 79615-68-2 | C12H15NO | 189.257 |
4-甲氧基苯甲醛 | 4-methoxy-benzaldehyde | 123-11-5 | C8H8O2 | 136.15 |
对羟基苯甲醛 | 4-hydroxy-benzaldehyde | 123-08-0 | C7H6O2 | 122.123 |
1-溴-4-(2,2-二甲基丙氧基)苯 | 1-bromo-4-(2,2-dimethylpropoxy)benzene | 528528-58-7 | C11H15BrO | 243.143 |
Four examples of 2,6-dicinnamoylpyridines were obtained in 6065% yields in condensations of commercially available 2,6-diacetylpyridine and benzaldehydes in 1:2 stoichiometry. At 2:1 ratios, four related 6,6''-diacetylated-4'-arylterpyridines were isolated in 7073% yields in one-pot condensations in the presence of NH3. 4,4'-Azo benzaldehyde, prepared from nitrobenzaldehyde in three steps and 40% overall yield was similarly converted to a novel azo-linked bis(terpyridine) in 50% yield in a reaction that assembles seven molecules in one step. The 6,6''-diacetylated-4'-arylterpyridines and the correspondingly substituted 2,6-dicinnamoylpyridines were condensed in 1:1 ratio together with NH3 to form 4,4'',4IV-triarylcyclosexipyridines in 2226% yields. These were obtained as mixed Na+ and K+ complexes and were insoluble amorphous solids, except for one example bearing 4-neopentoxyphenyl substituents. 1H NMR showed that the 4,4'',4IV-tri(4-neopentoxyphenyl)cyclosexipyridine complexes form aggregates in solution and at low concentrations show twofold symmetry arising from a loss of planarity.Key words: terpyridines, 4'-aryl-6,6''-diacetylterpyridines, azo-bisterpyridine, cyclosexipyridines, macrocyclization.