Pyridyl Grignard reagents were prepared from the corresponding iodopyridine and EtMgBr. New cross coupling reactions of the Grignard reagents with azaheterocycles took place on the sulfinyl sulfur atom to afford biazaheteroaryls.
Efficient palladium catalyzed synthesis of heteroaromatic sulfoxides
作者:Françoise Colobert、Rafael Ballesteros-Garrido、Frédéric R. Leroux、Rafael Ballesteros、Belén Abarca
DOI:10.1016/j.tetlet.2007.07.165
日期:2007.9
The present Letter describes the efficient synthesis of novel heteroaromatic sulfoxides by means of a palladium catalyzed heteroarylation of sulfenate anions. Triazolopyridine, pyridine and thiophene sulfoxides can be obtained under mild conditions and in high yield from the corresponding heteroaryl bromides.