“…[5][6][7][8] Recently, the synthesis of solid acid catalysts used as heterogeneous catalysts has attracted attention in various organic reactions. 3,4,[9][10][11] Today, there is increasing interest in the design and synthesis of heterogeneous supports containing high loads of sulfonic acid groups to increase the turnover number (TON) and turnover frequency (TOF) of the reaction. 12 Despite signicant advances in producing eco-friendly heterogeneous supports (such as cellulose, 13 silica, 14,15 carbon nanotubes, 16 iron aluminate spinel hercynite, 17 graphite carbon nitride, 18 magnetic nanoparticles, 4,5,7,[19][20][21] and polymers 22 ), it is necessary to set certain rules for their applications in terms of their synthesis, recycling, management, and cost.…”