3-Mercaptopropionic Acid → Poly(difluoromethylene), alpha-(2-((2-carboxyethyl)thio)ethyl)-omega-fluoro-
Reaction equation
[SH:1][CH2:2][CH2:3][C:4]([OH:6])=[O:5].[F:7][C:8]([F:12])([F:11])[CH:9]=[CH2:10]>C1(C)C=CC=CC=1>[F:7][C:8]([F:12])([F:11])[CH2:9][CH2:10][S:1][CH2:2][CH2:3][C:4]([OH:6])=[O:5]Participants
4
Reactant 2
Product 1
Reagents, catalysts & solvents 1
Conditions
- Temperature
- 20 °C
Procedure
A 100 mL stainless steel Pan reactor was charged with 3-mercaptopropionic acid (3.67 g, 34.6 mmol), toluene (30.26 g), and 2,2′-azobis(4-methoxy-2,4-dimethyl) valeronitrile (V-70, 0.543 g, 1.76 mmol) and the reactor was cooled with a dry ice/acetone bath, purged with nitrogen, and pressure checked. 3,3,3-Trifluoropropene (3.20 g, 33.3 mmol) was added via transfer cylinder and the reaction was allowed to warm to 20° C. After 24 hours, the reaction was heated to 50° C. for 1 hour to decompose any remaining V-70 initiator. The reaction was allowed to cool to room temperature. The solution was concentrated by rotary evaporation to provide the title compound (6.80 g, 77.5 wt % linear isomer by GC internal standard assay, 5.27 g active, 76%, 200:1 linear:branched by GC, 40:1 linear:branched by fluorine NMR)