Conversion of Pyridine<i>N</i>-Oxides to Tetrazolopyridines
作者:Shanshan Liu、Dieter Lentz、C. Christoph Tzschucke
DOI:10.1021/jo500231m
日期:2014.4.4
An efficient and convenient procedure for the conversion of pyridineN-oxides to tetrazolopyridines by treatment with 4-toluene sulfonyl chloride and sodium azide in toluene at elevated temperature is described.
A visible-light-driven iron-catalyzed C(sp3)–Hamination of diphenylmethane derivatives with 1,2,3,4-tetrazoles under mild conditions has been developed. The reaction proceeds with photosensitizer-free conditions and features satisfactory to good yields. Mechanistic studies revealed that the reaction proceeded via an iron–nitrene intermediate, and H atom abstraction was the rate-determining step. Computational