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Beilstein J. Org. Chem. 2020, 16, 2937–2947, doi:10.3762/bjoc.16.243
Graphical Abstract
Figure 1: Examples of biological activity and interesting chemical reactivity of N-sulfonyl amidines.
Figure 2: Data on the synthesis of N′-sulfonylazole-4-carboximidamides.
Scheme 1: Synthesis of 1-alkyl-N-phenyl-N'-(sulfonyl)-1H-1,2,3-triazole-4-carboximidamides 3.
Figure 3: Starting compounds.
Scheme 2: Scope for the reaction of 1-alkyl-1,2,3-triazole-4-carbothioamides 1a–d with azides 2a–f.
Scheme 3: Scope of the reaction of 5-arylamino-1,2,3-triazole-4-carbothioamides 1i–l with azides 2a,c–f.
Scheme 4: Synthesis of 2-aminothiazole-4-N-sulfonyl amidines.
Scheme 5: Synthesis of N-sulfonyl amidines of isoxazolylcarboxylic acid.
Scheme 6: Synthesis of bis(sulfonyl amidines) 3aj–an.
Scheme 7: Plausible mechanism for the reaction of heterocyclic thioamides with sulfonyl azides.