Nouveaux amphiphiles cationiques perfluoroalkylés dérivés des 1-monotosylate et 1-monobromoacetate de 2-F-alkyl 2-bromo ethanols. II
作者:M. Nasreddine、S. Szönyi、A. Cambon
DOI:10.1016/0022-1139(93)02916-3
日期:1994.3
etherification reactions have been investigated for 2-F-alkyl-2-bromo-ethanols. Intermediates containing a tosyl group or a bromine atom could be converted into the corresponding F-alkylated cationic amphiphiles by means of secondary and tertiary amines.
The synthesis of new 2-F-alkyl-2-hydroxyethylphenyl sulfoxides 3 and their 2-methyl ethers 4 is reported. They undergo the Pummerer rearrangement to yield 2-F-alkyl-1,2-diacetoxyethylphenyl sulfides 7 and 2-F-alkyl-1-etoxy-2-methoxyethylphenyl sulfides 8, respectively.
Reactivity of F-alkyl oxirans was investigated towards nucleophilic and electrophilic reagents. They are quite inert in acid medium. On the other hand, in basic medium they lead to regiospecific opening reactions. Their reactions with organometalliccompounds need extreme conditions : with Grignardreagents they sometimes lead to unexpected results.
FLUORINATED OXIRANES AS ORGANIC RANKINE CYCLE WORKING FLUIDS AND METHODS OF USING SAME
申请人:3M INNOVATIVE PROPERTIES COMPANY
公开号:US20140311146A1
公开(公告)日:2014-10-23
A process and an apparatus for converting thermal energy into mechanical energy in a Rankine cycle is provided. The process and apparatus include a working fluid that comprises a fluorinated oxirane. The fluorinated oxirane can contain substantially no hydrogen atoms bonded to carbon atoms and can have from about 4 to about 9 carbon atoms. The process can drive a turbine and, in some embodiments, generate electricity.
An lubricant composition comprising a C
4
to C
15
fluorooxirane fluid having a boiling point ≧20° C., and a lubricant soluble or dispersible therein, is provided.