Calcium-catalyzed reactions of element-H bonds

Organotellurium catalysis-enabled utilization of molecular oxygen as oxidant for oxidative deoximation reactions under solvent-free conditions

“…During our continuous investigations on green catalysis science and technologies [27][28][29][30], we recently focused on the oxidative deoximation reaction because of the great significances of this transformation in fine chemical production, as well as the total synthesis of natural products [31,32]. Thus, in this work, commercially available (PhTe) 2 was tested to catalyze the oxidative deoximation reaction, which, at present stage, usually requires chemical reagents generating a lot of solid waste [33], explosive oxidants [34,35], halogen-or nitro-contained solvents or additives [36], or precious metal catalysts [37].…”

Synthesis of LiPF6 Using CaF2 as the Fluorinating Agent Directly: An Advanced Industrial Production Process Fully Harmonious to the Environments

“…Recently, it has been demonstrated the calcium compounds were especially active for many reactions. , Therefore, we supposed that CaF 2 might be used as the direct fluorinating agent of PCl 5 to generate PF 5 . After a series of explorations, the objective was successfully achieved and the method led to CaCl 2 as the by-product (Scheme , method b).…”

Construction of Carbocycles from Methylenecyclopropanes

“…In 2014, we developed a green and convenient method for the synthesis of 2‐MCBones via the Ca(OH) 2 ‐catalyzed direct condensation of aldehydes with commercially available cyclobutanone . The use of cheap, abundant and mild Ca(OH) 2 as catalyst to form the C−C bond is also the advantage of the method . Moreover, it was recently found that the 2‐MCBones are highly active and could be reduced by atmospheric H 2 in the presence of Pd/C catalyst under mild conditions …”