A new series of liquid crystals (LCs), benzotriazol type which have high absorptivities to ultraviolet (UV) light within the wavelength range from 290 to 350 nm were synthesized. Their syntheses and liquid crystalline properties are reported in this paper.
Synthesis and preliminary pharmacological investigation of some 2-[4-(dialkylaminoalkoxy) phenyl] benzotriazoles and their N-oxides
作者:Anna Sparatore、Fabio Sparatore
DOI:10.1016/s0014-827x(97)00015-3
日期:1998.2
A set of 2-[4-(dialkylaminoalkoxy)phenyl]benzotriazoles and corresponding N-oxides was prepared. In a preliminary pharmacologicalinvestigation concerning some of these compounds, several in vitro and in vivo activities were shown. At concentrations in the range of 3-10 microM all tested compounds strongly inhibited (50-100%) the guinea pig ileum contractions induced either electrically or by means
A Convenient Protocol for the Synthesis of 2-(2′-Hydroxy-5′-carboxyphenyl)-2H-benzotriazole to Avoid Decarboxylation When Using p-Hydroxybenzoic Acid as Coupling Component
of the synthesis of 2‐(2′‐hydroxy‐5′‐carboxyphenyl)‐2H‐benzotriazole, we found that decarboxy intermediate‐4‐((2‐nitrophenyl)diazenyl)phenol was obtained whenusing p‐hydroxybenzoic acid as couplingcomponent. A convenientprotocol for the synthesis of 2‐(2′‐hydroxy‐5′‐carboxyphenyl)‐2H‐benzotriazole is reported with methyl‐p‐hydroxybenzoate as couplingcomponent. Different dizao components and different