US 7,321,071 B2
Process for the production of water-soluble fluorine-containing vinyl ethers
Kenji Ishii, Settsu (Japan); Noriyuki Shinoki, Settsu (Japan); Takuya Arase, Settsu (Japan); Kazuyoshi Ichihara, Settsu (Japan); and Toshiya Mantani, Settsu (Japan)
Assigned to Daikin Industries, Ltd., Osaka (Japan)
Appl. No. 10/517,667
PCT Filed Jun. 16, 2003, PCT No. PCT/JP03/07592
§ 371(c)(1), (2), (4) Date Dec. 13, 2004,
PCT Pub. No. WO03/106409, PCT Pub. Date Dec. 24, 2003.
Claims priority of application No. 2002-175130 (JP), filed on Jun. 14, 2002.
Prior Publication US 2005/0245758 A1, Nov. 03, 2005
Int. Cl. C07C 17/00 (2006.01); C07C 17/25 (2006.01)
U.S. Cl. 570—155 18 Claims
 
1. A method for producing a water-soluble fluorine-containing vinyl ether
which comprises subjecting a fluorine-containing 2-alkoxypropionic acid derivative represented by the following general formula (I):

OG Complex Work Unit Drawing
 (wherein A represents —OM1 or —OM21/2, and M1 represents an alkali metal and M2 represents an alkaline earth metal; X represents a halogen atom; Y1 and Y2 are the same or different and each represents a fluorine atom, a chlorine atom, a perfluoroalkyl group or a fluorochloroalkyl group; n represents an integer of 0 to 3, and n atoms/groups of Y1 may be the same or different; m represents an integer of 1 to 5, and m atoms/groups of Y2 may be the same or different; and Z represents a hydrophilic group) to thermal decomposition at a temperature of not lower than 50° C. but lower than 170° C. in the presence of a coordinating organic solvent comprising one or both of ethyl acetate and tetrahydrofuran to give a water-soluble fluorine-containing vinyl ether represented by the following general formula (II):

OG Complex Work Unit Drawing
 (wherein Y1, y2, Z, n and mare as defined above),
said coordinating organic solvent having a coordinating property with an ion of said M1 or an ion of said M2 and
said coordinating organic solvent being in an amount of 10 to 1,000 parts by mass per 100 parts by mass of said fluorine-containing 2-alkoxypropionic acid derivative.