“…This reaction most often consists of a CDC, forming a C–P bond from C–H and H–P bonds. This can be done using a range of metal catalysts such as copper, − iron, cobalt, , molybdenum, gold, , silver, − indium, and antimony, , in combination with a terminal oxidant such as oxygen to regenerate the catalyst. Alternatively, in an attempt to offer a more sustainable protocol, some groups have opted for metal-free options using additives like DDQ, − I 2, CBr 4 , diethyl azodicarboxylate, thiourea, , iminium cations, , ortho -quinone, or sulfuryl chloride to initiate the reaction.…”