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. 2021 May 15;57(4):383–409. doi: 10.1007/s10593-021-02916-4

Table 3.

Examples of NH2SO3H-catalyzed three-component reaction of compounds 1а, 138, and 139 to obtain compounds 140

Entry Ar R Reaction time, min Yield, %
1 Ph Me 15 94
2 4-ClС6Н4 Me 15 90
3 4-BrС6Н4 Me 15 90
4 4-MeOС6Н4 Me 18 90
5 4-HOС6Н4 Me 20 90
6 4-O2NС6Н4 Me 18 95