Polyglymes

Polyglymes offer a viable alternative as solvents to the potentially carcinogenic HMPA.1871188 Alkyl and phenyl sulfides were prepared from the reaction of suitable aryl halide precursors and an excess of sodium thiolates in tetraglyme.188 By the same procedure 2-(alkylthio)-substituted (alkyl = Me(CH2)n n = 3, 15,17) quinolines, pyrimidines and pyrazines were prepared from the corresponding chlorides.187... 

In addition to crown ethers, cryptates and polyglyme exhibit similar behavior. Table 6.2 presents some Tg and Tm values of some polycarbonates picked from the literature. 

POLYGLYME CnHsiHtOw 275 1.04 8.6 <0.01 <0.1 12 215 >130 CLEAR SLIGHTLY YELLOW VERY mild non-residual COMPLETE COMPLETE OCTANE... 

Trade Name Synonyms Polyglyme [Ferro/Grant http //www. ferro. com]... 

Styrene/acrylamide copolymer 24991-31-9 Polyvinyl butyrate 24991-55-7 PEG dimethyl ether PEG-3 dimethyl ether PEG-4 dimethyl ether Polyglyme Tetraglyme 25013-15-4 Vinyltoluene monomer 25013-16-5 Avox BHA BHA... 

In addition to crown ethers, cryptates and polyglyme exhibit similar behavior [37]. 

In line with these results, multidentate podands such as 7 and 8 can operate as catalysts under solid-liquid phase-transfer conditions. A series of solid-liquid PTC nucleophilic displacements was performed in the presence of simple polyglymes 6 with a sufficiently long chain (n = 7-9)... 

Diborane is also liberated when solutions of NaBHi and other borohydrides are electrolyzed in an inert solvent (e.g., in one of the W,W-dialkylformamides (23) or in a polyglyme) (275). In diglyme it is the only borane to appear, but the method has not foiind general favor because NaB2Hy formation hinders the liberation... 

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