在本文中,在连续流式微反应器系统中合成了6个6-和1,6-取代的-4-甲基-3-氰基-2-吡啶酮。在室温下进行合成,并将获得的结果与经典合成中获得的结果进行比较。为了优化连续流合成并增加产物的产率,通过改变反应物溶液的流速来改变在微反应器中的保留时间。此外,针对在医药和染料工业中商业上重要的4,6-二甲基-3-氰基-2-吡啶酮和6-羟基-4-甲基-3-氰基-2-吡啶酮对反应进行了优化。在不到10分钟的时间内,以约60%的满意产率获得了两种2-吡啶酮。所得化合物的特征在于熔点,FT-IR,1 H NMR和UV-Vis光谱。
New fluorine-containing azopyridone dyes, 3-cyano-6-hydroxy-5-[2-(perfluoroalkyl)phenylazo]-2-pyridones, have been synthesized. Though the introduction of a long perfluoroalkyl group lowered film forming ability and sensitivity, 5-[2-(trifluoromethyl)phenylazo]- and 5-[2-(perfluorobutyl)phenylazo]-3-cyano-4-methyl-6-hydroxy-2-pyridones showed good photostability.
an interesting binding motif for the construction of functional supramolecular architectures. This dipolar aggregation has been utilized for the formation of well-defined cylindrical nanorods. The self-assembly of these nanorods is profoundly influenced by solvent polarity which determines nanorod growth under kinetic or thermodynamic control. A newly synthesized series of bis(merocyanine) dyes bearing
The present invention relates to novel dyestuffs of formula (I)
wherein the substituents have the meanings defined in the claims, the production of such dyestuffs, the use of these dyestuffs and material dyed or printed by such dyestuffs.