Fabrication of activated carbon sulfuric acid as an excellent and novel solid acid catalyst, evaluating its catalytic activity in synthesizing 1,8-dioxo-octahydroxanthenes and 14-aryl-14H-dibenzo[a,j]xanthenes

A novel core@double-shell three-layer structure with dendritic fibrous morphology based on Fe3O4@TEA@Ni–organic framework: a highly efficient magnetic catalyst in the microwave-assisted Sonogashira coupling reaction

“…to achieve maximum conversion in an environmentally friendly manner due to the challenge of reaction design from a sustainable perspective (e.g., more energy usage, straightforward catalyst recovery, and avoidance of high amounts of organic solvents). [20][21][22][23] Other challenges, such as catalyst separation and recycling, have been resolved through the use of heterogeneous catalysts and the development of magnetic-supported catalysts. [24][25][26] Magnetic nanocatalysts with magnetic cores and organic or inorganic shells with diverse functional groups were introduced as the solution for the separation and recycling of catalysts from the reaction medium.…”

“…, more energy usage, straightforward catalyst recovery, and avoidance of high amounts of organic solvents). 20–23 Other challenges, such as catalyst separation and recycling, have been resolved through the use of heterogeneous catalysts and the development of magnetic-supported catalysts. 24–26…”