Claims
- 1. A method of synthesizing 2,2-bis(4-fluorophenyl)hexafluoropropane comprising the steps of:
- (a) treating 2,2-bis(4-aminophenyl)hexafluoropropane with a sufficient amount of fluoride ion donor and a sufficient amount of a nitrite at a temperature within the range of about -5.degree. C. to 10.degree. C. to form a bis-diazonium salt; and
- (b) treating said bis-diazonium salt with a solvent selected from the group consisting of toluene and xylene at a temperature within the range of about 80.degree. C. to 110.degree. C. and for about 0.5 to 1.5 hours to form 2,2-bis(4-fluorophenyl)hexafluoropropane.
- 2. The method as set forth in claim 1 wherein said fluoride ion donor in step "a" is fluoroboric acid.
- 3. The method as set forth in claim 1 wherein said nitrite in step "a" is sodium nitrite.
- 4. The method as set forth in claim 1 wherein said aromatic solvent in step "b" is toluene.
- 5. The method as set forth in claim 1 including the further step of separating said 2,2-bis(4-fluorophenyl)hexafluoropropane from said solvent.
Parent Case Info
This application is a continuation of application Ser. No. 081,555, filed July 31, 1987 abandoned, which is a continuation of Ser. No. 808,402, filed Dec. 12, 1985 abandoned.
US Referenced Citations (5)
Foreign Referenced Citations (1)
Number |
Date |
Country |
215920 |
Apr 1968 |
SUX |
Continuations (2)
|
Number |
Date |
Country |
Parent |
81555 |
Jul 1987 |
|
Parent |
808402 |
Dec 1985 |
|