ISSN:
0941-1216
Keywords:
Chemistry
;
Organic Chemistry
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
Notes:
Preparation and Characterisation of N-Disubstituted 2-Amino-4-chloro-5-formyl-thiazoles and Their Dicyanmethylene DerivativesIn contrast to N-disubstituted 3-hydroxy-anilines 5 which react with the Vilsmeier reagent to N-substituted 4-amino-salicylaldehydes 7 their heteroanalogous N-disubstituted 2-amino-4-hydroxy-thiazoles 6 react with the same reagent to N-substituted 2-amino-4-chloro-thiazole-5-aldehydes 12 via their corresponding iminium salts precursors 11. Both types of compounds can be transformed, in analogy to other 2-amino-thiazole-5-aldehydes, by reaction with malodinitrile 13 into stable N-substituted 2-amino-4-chloro-5-(2,2-dicyano-ethenyl)-thiazoles 14.
Additional Material:
2 Tab.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/prac.19963380108
