β-(Cycloalkylamino)ethanesulfonyl azides as novel water-soluble reagents for the synthesis of diazo compounds and heterocycles
作者:Yuri M. Shafran、Pavel S. Silaichev、Vasiliy A. Bakulev
DOI:10.1007/s10593-019-02609-z
日期:2019.12
water-soluble sulfonyl azides were synthesized, which are basic by nature. The obtained compounds were used as donors of the diazo group in the diazotransfer reaction. Due to their good solubility in water and high polarity, the byproducts formed in this case were easily separated from the desired products by washing with water or column chromatography. It was also shown that new sulfonyl azides as a result
Tandem Cycloaddition of Azides to 3,3-Diaminoacrylonitriles (2-Cyanoacetamidines) and Cornforth-Type Rearrangement as an Approach to 5-Amino-1,2,3-triazole-4-<i>N</i>-substituted Imidamides
作者:Pavel S. Silaichev、Tetyana V. Beryozkina、Vladimir Ilkin、Mikhail S. Novikov、Wim Dehaen、Vasiliy A. Bakulev
DOI:10.1021/acs.joc.3c00151
日期:2023.7.7
base and N-mono- or N,N′-disubstituted 3,3-diaminoacrylonitriles. The reaction is tolerant to variously N-monosubstituted and N,N′-disubstituted 3,3-diaminoacrylonitriles and to various aryl- and aryl/alkyl sulfonyl azides. The developed method has a broad scope and can be applied to obtain a variety of 5-amino-1,2,3-triazole-4-carbimidamides bearing at the N1 position alkyl, allyl, propargyl, benzyl