Process for selective preparation of macrocyclic polyethers

Details Process for selective preparation of macrocyclic polyethers Process for selective preparation of macrocyclic polyethers

C - Chemistry, Metallurgy

07

D

260/350.5

C07D 323/00 (2006.01) C08G 65/26 (2006.01)

Patent

CA 1039733

PROCESS FOR SELECTIVE PREPARATION OF MACROCYCLIC POLYETHERS Abstract of the Disclosure Cyclic polyethers of the general formula Image in which n is an integer from 3 - 11, particularly from 4 - 6, are prepared by oligomerization of ethylene oxide in the presence of boron trifluoride, phosphorus pentafluoride or antimony pentafluoride as catalyst, and in the presence of fluoborate, fluophosphate or fluoantimonate salts of alkali metals, alkaline earth metals or transition metals, to form complexes between the polyethers formed and said salts, separating the complexes from the reaction mixture and libera- ting the polyethers from the complexes.

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