10335-52-1

Upstream product

• 136-95-8 2-amino-benzthiazole 
• 108-95-2 phenol 

Downstream Products

• 38901-87-0 4-(3-methylbenzothiazolin-2-ylidenehydrazono)-2,5-cyclohexadien-1-one 
• 65902-55-8 2-(4-methoxy-phenylazo)-benzothiazole 
• 73334-50-6 2-(4-isopropoxy-phenylazo)-benzothiazole 
• 73334-49-3 2-(4-hydroxy-phenylazo)-3-isopropyl-benzothiazolium betaine 
• 73334-52-8 2-(4-butoxy-phenylazo)-benzothiazole 
• 73334-51-7 3-butyl-2-(4-hydroxy-phenylazo)-benzothiazolium betaine 
• 73334-54-0 2-(4-octyloxy-phenylazo)-benzothiazole 
• 73334-53-9 2-(4-hydroxy-phenylazo)-3-octyl-benzothiazolium betaine 

Relevant academic research and scientific papers

Series of azobenzothiazole-based initiators for atom transfer radical polymerization of methyl methacrylate

2-Bromo-2-methyl-propionic acid 4-benzothiazole-2-ylazo-phenyl ester (BPBE), 2-bromo-2-methyl-propionic acid 4-(6-methoxybenzothiazole-2-ylazo)phenyl ester (BPMBE) and 2-bromo-2-methyl-propionic acid 4-(6-nitro-benzothiazole-2- ylazo)phenyl ester (BPNBE) were synthesized and acted as initiators for the heterogeneous atom transfer radical polymerization of methyl methacrylate under copper(I) bromide/2,2′-bipyridine catalytic system, respectively. The azobenzothiazole-based end group of polymethyl methacrylate was characterized via UV-visible spectroscopy. All rates of polymerizations exhibited first-order kinetic with respect to the monomer and a linear increase in the number-average molecular weight with increasing monomer conversion was observed for all these initiation systems. The polydispersity indices of the polymethyl methacrylates were relatively low (1.08-1.37) up to high conversions at 60 °C. Moreover, the initiation systems exhibit a high activity that polymerizations could even be performed at ambient temperature (30 °C).

Spectrophotometric investigations of the role of the organic solvent on the acid dissociation constants of some azo dyes derived from 2-aminobenzothiazole

Proton dissociation constants (pKa) of a set of hydroxyl azo dyes in various organic solvent + water mixtures have been determined. The results obtained were discussed in terms of the solvent characteristic. Effects of hydrogen-bonding interactions and solvent basicity on the ionization process have been also discussed. In a nutshell, the pKa values of the investigated compounds were found to be largely depending on both the ratio and the nature of organic cosolvent. In addition, it was very important to know with which structures we are dealing in liquid solutions and how these structures influence physicochemical properties of individual tautomers and their acidity constants. Thus, theoretical calculations have been done in order to obtain an insight into structure features and physicochemical properties of the compounds under study.