74632-03-4Relevant articles and documents
Five-fold-symmetric macrocyclic aromatic pentamers: High-affinity cation recognition, ion-pair-induced columnar stacking, and nanofibrillation
Ren, Changliang,Maurizot, Victor,Zhao, Huaiqing,Shen, Jie,Zhou, Feng,Ong, Wei Qiang,Du, Zhiyun,Zhang, Kun,Su, Haibin,Zeng, Huaqiang
supporting information; experimental part, p. 13930 - 13933 (2011/10/30)
Described in this study is a conceptually new class of five-fold-symmetric cavity-containing planar pentameric macrocycles with their interior decorated by five convergently aligned, properly spaced carbonyl oxygen atoms. These cation-binding oxygens enclose a hydrophilic lumen of 2.85 A in radius and thus display high-affinity binding toward alkali metal cations, and possibly many other cations, too. Arising from their high-affinity recognition of metal ions, these planar macrocycles form cation- or ion-pair-induced one-dimensional columnar aggregates, and subsequently fascinating fibrillation results.
Synthesis of N-modified 4-aminopyridine-3-carboxylates by ring transformation
Nishiwaki, Nagatoshi,Nishimoto, Toyosato,Tamura, Mina,Ariga, Masahiro
, p. 1437 - 1439 (2007/10/03)
3-Methyl-5-nitropyrimidin-4(3H)-one reacted with enaminones to cause the ring transformation leading to functionalized 4-aminopyridines. Various kinds of amino groups can be introduced at the 4-position by modifying the enaminones. The modification of its vicinal positions was also possible. In addition, a bicyclic pyridine could be synthesized by making use of the vicinal functionality of a 4-aminopyridine-3-carboxylic acid. Georg Thieme Verlag Stuttgart.
Synthesis and transformations of alkyl 1,5-bis-(dimethylamino)-3-oxopenta-1,4-diene-2,4-dicarboxylates. A simple synthesis of dialkyl 1-substituted 4-oxo-1,4-dihydropyridine-3,5-dicarboxylates
Zupancic, Silvo,Svete, Jurij,Stanovnik, Branko
, p. 2033 - 2042 (2007/10/03)
Dimethyl (2a) and diethyl 1,5-bis(dimethylamino)-3-oxo-penta-1,4-diene-2,4-dicarboxylate (2b), available in good yields from the corresponding dialkyl acetonedicarboxylates (1a, b) and N,N-dimethylformamide dimethyl acetal (DMFDMA), were used as reagents for a one-step preparation of 1-substituted 1,4-dihydropyridin-4-ones (3a-u). Thus, compounds (2) were treated with ammonia, hydrazines, and primary aliphatic, aromatic, or heterocyclic amines to form dialkyl 1-substituted 4-oxo-1,4-dihydropyridine-3,5-dicarboxylates (3a-u).