34587-25-2Relevant articles and documents
Carbon tetrabromide mediated oxidative cyclocondensation of ketones and thioureas: An easy access to 2-aminothiazoles
Keshari, Twinkle,Kapoorr, Ritu,Yadav, Lal Dhar S.
supporting information, p. 5623 - 5627 (2015/09/21)
A simple, mild, and efficient one-pot method for the synthesis of substituted 2-aminothiazoles has been reported. The reaction involves the formation of sulfenyl bromide as an umpolung intermediate of nucleophilic sulfur, which is responsible for C-S bond formation leading to oxidative cyclization of ketones and thioureas to furnish the desired products. Carbon tetrabromide was used as a convenient and mild brominating reagent under basic condition at room temperature to give 2-aminothiazoles in good to excellent yields.
Synthesis and Characterization of 1,3-Bis-(2-dialkylamino-5-thiazolyl)-Substituted Squaraines and Their 2-(Dialkylamino)thiazole Precursors
Keil, D.,Hartmann, H.
, p. 979 - 984 (2007/10/02)
By condensation of squaric acid (1) with 2-(dialkylamino)-substituted thiazoles 8 a novel type of heterocyclic-substituted squaraines of the general structure 9 was prepared in moderate yield mostly.The squaraines 9 obtained are sparingly soluble in the most organic solvents and exhibit, in these solvents, narrow absorption bands in the visible range at about 620-700 nm.In dispersed form, the absorption bands of the squaraines 9 are, however, broadened and shifted into the NIR region at about 900 nm.These unique properties of the new squaraines 9 suggest the use of these dyes as spectral sensitizers for laser-driven data recording or data storage media. - Key Words: Squaraines/ Squaric acid/ Thiazoles/ Sensitizers
Reactions of 2-dialkylamino-5-phenyl-1,3-oxathiolium cation with nucleophiles containing an amino group
Hirai,Ishiba
, p. 3017 - 3022 (2007/10/04)
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