Preparation and UV/Vis Spectroscopic Characterization of N,N-Disubstituted 2-Amino-5-arylazoselenazoles and Some of Their Carbocyclic and Heterocyclic Analogues

✍ Scribed by Dietmar Keil; Horst Hartmann; Ines Zug; Anke Schroeder

• Publisher: John Wiley and Sons
• Year: 2000
• Tongue: English
• Weight: 54 KB
• Volume: 342
• Category: Article
• ISSN: 1615-4150
• DOI: 10.1002/(sici)1521-3897(200002)342:2<169::aid-prac169>3.0.co;2-6

✦ Synopsis

In the last three decades N,N-disubstituted 2-amino-thiophenes 2 and 2-amino-thiazoles 3 received a lot of interest. As heteroanalogues of N,N-disubstituted anilines 1, which are important starting compounds for the synthesis of organic dyes [1], they have been used as versatile educts for preparing different types of organic dyes also. Thus, N,N-disubstituted 2-amino-thiophenes 2 could by successfully transformed, especially if they are unsubstituted in their 5-position, e.g., into azo dyes [2], methine dyes [3], and squarylium and croconium dyes [4]. Analogously, N,N-disubstituted 2-amino-thiazoles 3 have been transformed into corresponding azo dyes [5], methine and azomethine dyes [6], and squarylium dyes [7].