申请人:E.I. DU PONT DE NEMOURS AND COMPANY
公开号:EP0529741A1
公开(公告)日:1993-03-03
A process for preparing a dioxolane of the formula
wherein:
RFis a perfluorinated alkyl group having 1 to 14 carbon atoms and terminally substituted with -F, -Cl, -OR, -OC₆F₅, -SR', -SO₂R', -SO₂F, -N₃, -CN or -C(O)OR', or said perfluorinated alkyl group also containing ether oxygen,
R'is an alkyl group of 1 to 4 carbon atoms;
Ris an alkyl group of 1 to 4 carbon atoms, -CH₂CF₃ or -C₆H₅;
Yis -H, -OR or -CF₂CF₂Z; and
Zis -F, -N₃, -OC₆H₅, -SR' or -OC₆F₅;
comprising contacting at a temperature of from about -20°C to about 80°C a 2-chloro- or 2-bromoethyl fluoroalkyl carboxylate having the formula RFCO₂CH₂CH₂X with a compound of the formula MY¹ in a suitable solvent; wherein Y¹ is -H, -OR or -CF₂CF₂Z; X is -Cl or -Br, and M is Na, Li, K or NR'₄ .
一种制备式如下的二氧戊环的工艺
其中
RF是具有1至14个碳原子并被-F、-Cl、-OR、-OC₆F₅、-SR'、-SO₂R'、-SO₂F、-N₃、-CN或-C(O)OR'末端取代的全氟烷基,或所述全氟烷基还含有醚氧、
R'是 1 至 4 个碳原子的烷基;
R 是 1 至 4 个碳原子的烷基、-CH₂CF₃ 或 -C₆H₅;
Y是-H、-OR或-CF₂CF₂Z;以及
Z是-F、-N₃、-OC₆H₅、-SR'或-OC₆F₅;
包括在约 -20°C 至约 80°C 的温度下,将式 RFCO₂CH₂CH₂X 的 2-氯或 2-溴乙基氟烷基羧酸酯与式 MY¹ 的化合物在合适的溶剂中接触;其中 Y¹ 是-H、-OR 或-CF₂CF₂Z;X 是-Cl 或-Br,M 是 Na、Li、K 或 NR'₄ 。