Synthesis of 1, 3-selenazoles and bis (selenazoles) from primary selenocarboxylic amides and selenourea

…, WD Pfeiffer, A Künzler, H Below, E Bulka, P Langer

Index: Geisler, Karlheinz; Pfeiffer, Wolf-Diethard; Kuenzler, Andreas; Below, Harald; Bulka, Ehrenfried; Langer, Peter Synthesis, 2004 , # 6 p. 875 - 884

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Citation Number: 24

Abstract

Abstract The reaction of nitriles with P 2 Se 5 in the presence of EtOH-H 2 O afforded primary selenocarboxylic amides. The cyclization of these compounds with α-halo ketones afforded a variety of functionalized 1, 3-selenazoles. The use of P 2 Se 5 also allowed the convenient synthesis of selenocarboxylic diamides which were transformed into bis (selenazol-2-yl) alkanes ('bis-selenazoles'). A practical method for the synthesis of selenourea was ...

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