Alkylation of 5-Substituted 1<i>H</i>-Tetrazoles via the Diazotization of Aliphatic Amines
作者:Guillaume Reynard、Hélène Lebel
DOI:10.1021/acs.joc.1c01585
日期:2021.9.3
A new alkylation reaction of monosubstituted tetrazoles via the diazotization of aliphatic amines is reported. This method enables preferential formation of 2,5-disubstituted tetrazoles. A one-pot 1,3-dipolar cycloaddition/diazotization sequence starting from widely available nitriles is also described. Azide residues are quenched in the second step with the nitrite reagent, thus limiting the intrinsic
报道了通过脂肪胺的重氮化作用进行单取代四唑的新烷基化反应。这种方法能够优先形成 2,5-二取代四唑。还描述了从广泛可用的腈开始的一锅 1,3-偶极环加成/重氮化序列。叠氮化物残留物在第二步中用亚硝酸盐试剂淬灭,从而限制了与三甲基甲硅烷基叠氮化物相关的内在风险。反应条件与几个官能团相容,包括硫氰酸酯,它们优先提供双取代的 2-烷基-5-(取代-硫代)四唑。