A one-pot procedure is described for the preparation of 1H-pyrazole-carboximidamides 2, 1 H-benzotriazole-carboximidamides 3 and guanidinylation of amines with 3. The X-ray crystal structure of N,N-dimethyl- 1 H-benzotriazole- 1 -carboximidamide 3b, has been determined. (C) 2004 Elsevier Ltd. All rights reserved.
A one-pot procedure is described for the preparation of 1H-pyrazole-carboximidamides 2, 1 H-benzotriazole-carboximidamides 3 and guanidinylation of amines with 3. The X-ray crystal structure of N,N-dimethyl- 1 H-benzotriazole- 1 -carboximidamide 3b, has been determined. (C) 2004 Elsevier Ltd. All rights reserved.
A convenient approach to arenediazonium tosylates
作者:Mateja Mihelač、Ana Siljanovska、Janez Košmrlj
DOI:10.1016/j.dyepig.2020.108726
日期:2021.1
tert-butyl nitrite in the presence of an equimolar amount or small excesses of p-toluenesulfonic acid in ethyl acetate, at room temperature. o-Phenylenediamines yield benzotriazolium tosylates. The resulting diazonium tosylates proved to be bench stable over a long period of time. In selected examples, diazonium salts were let to react with activated aromatic compounds including 2-naphthol and aniline derivatives