Tetrahedron Letters

Cl 3 CCN/PPh 3 and CBr 4/PPh 3: two efficient reagent systems for the preparation of N-heteroaromatic halides

W Kijrungphaiboon, O Chantarasriwong, W Chavasiri

Index: Kijrungphaiboon, Woranun; Chantarasriwong, Oraphin; Chavasiri, Wainthorn Tetrahedron Letters, 2012 , vol. 53, # 6 p. 674 - 677

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Citation Number: 13

Abstract

N-Heteroaromatic halides can be prepared from various starting materials. The general protocols mostly stem from the conversion of N-heteroaromatic hydroxy compounds because of their commercial availability and easy transformations. SOCl 2 , POCl 3, or PCl 5 6, 7 and 8 are used as chlorinating agents in the synthesis of N-heteroaromatic chlorides. Similarly, N-heteroaromatic bromides can be synthesized by using POBr 3 9 or PBr 3 . 10 However, such reagents are harmful, ...