Patent ID: 7951981

Claim:
A process for producing a perfluoroalkyne compound comprising: an addition reaction step of adding Cl 2 , Br 2 , or I 2 to a compound shown by the formula (1) CH 3 C≡CR 1 (wherein R 1 is a methyl group or an ethyl group) to obtain a compound shown by the formula (2) CH 3 CX 2 CX 2 R 1 (wherein R 1 is the same as above and X is Cl, Br, or I); a fluorination reaction step of reacting the compound shown by the formula (2) with fluorine gas to obtain a compound shown by the formula (3) CF 3 CX 2 CX 2 R 2 (wherein X is the same as above and R 2 is a trifluoromethyl group or a pentafluoroethyl group); and a dehalogenation reaction step of contacting the compound shown by the formula (3) with a metal or an organometallic compound to obtain a perfluoroalkyne compound shown by the formula (4) CF 3 C≡CR 2 (wherein R 2 is the same as above).