Synthesis and properties of trifluoromethoxyl fluoroformyl anhydride, CF3OC(O)OC(O)F

Recent Advances in the Synthesis and Transformation of Carbamoyl Fluorides, Fluoroformates, and Their Analogues

“…Later, trifluoromethoxyl fluoroformyl anhydride ( 220 ) was derived by two strategies: 1) the thermal decomposition of CF 3 OC(O)OOOC(O)F ( 218 ) in the presence of excess CO and 2) the reaction of CF 3 OC(O)OOC(O)F ( 219 ) with 215 and CO (Scheme 38). [69] The construction of 220 through the thermal decomposition of 218 with excess CO involved the combination of the in situ formed CF 3 OC(O)• ( 213 ) and FCO 2 • ( 217 ) radicals [69] . The key to produce the anhydride is the condensation of trioxide on the walls of the reactor by removing all other products and adding CO.…”

“…In this way, the concentrations of CF 3 OC(O)• ( 213 ) and FCO 2 • ( 217 ) radicals were appropriate to generate 220 although byproduct CF 3 OC(O)OC(O)OCF 3 was formed. The second method for the synthesis with 219 , 215 , and CO could prevent the production of CF 3 OC(O)OC(O)OCF 3 byproduct [69] …”

“…[69] The construction of 220 through the thermal decomposition of 218 with excess CO involved the combination of the in situ formed CF 3 OC(O) * (213) and FCO 2 * (217) radicals. [69] The key to produce the anhydride is the condensation of trioxide on the walls of the reactor by…”