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To achieve a safe, efficient, and sustainable (even fully automated) production for the continuous‐flow hydrogenation reactions, which is among the most often used reactions in chemical synthesis, new catalyst types and immobilization methods as well as flow reactors and technologies have been developed over the last years; in addition, these approaches have been combined with new and transformational technologies in other fields such as artificial intelligence. Thus, attention from academic and industry practitioners has increasingly focused on improving the performance of hydrogenation in flow mode by reducing the reaction times, increasing selectivities, and achieve safe operation. This Minireview aims to summarize the most recent research results on this topic with focus on the advantages, current limitations, and future directions of flow chemistry. [ABSTRACT FROM AUTHOR]

Pt was replaced with tungsten carbide (WC) in the Ni-Pt structure for decalin dehydrogenation on base of their similar properties. The catalytic performance of Ni-WC catalyst was predicted by density functional theory (DFT) calculations and further confirmed by dehydrogenation reaction. Replacing Pt with WC significantly reduces the side reactions such as ring-opening and coking. The highest conversion of decalin is about 93 % and the selectivity to naphthalene is nearly 100 % over Ni-WC/AC catalyst. The improved catalytic activity of Ni-WC/AC demonstrates the feasibility to replace Pt with WC as an active and less expensive dehydrogenation catalyst. Graphical Abstract: [Figure not available: see fulltext.]. [ABSTRACT FROM AUTHOR]

4′,4″(5″) Di- tert-butyldibenzo 18-crown-6 (DTBB18C6) was successfully synthesized by SN2 with 4- tert-butyl catechol as starting material. Effects of reagents, solvents, and templates were investigated. Reaction process was monitored by the real-time online FTIR to study the actual reaction route. The highest DTBB18C6 yield (above 33%) was obtained by using Cs2CO3 as the template, 2,2′-diethylene glycol ditosylate as the reagent, and THF as the solvent. From the result of FTIR, four different reaction stages of DTBB18C6 synthesis process were proposed. [ABSTRACT FROM AUTHOR]