NOVEL COMPLEX OF LARGE CYCLIC POLYETHER *AND METHOD OF ISOLATING SAID LARGE CYCLIC POLYETHER BY SAID COMPLEX

摘要

ABSTRACTComplexes between (1) a disulphonate of formula(X is barium or strontium and R1 is a bivalent group derivedfrom an alkane by removal of two hydrogen atoms) and (2) amacrocyclic polyether compatible with a barium or a strontiumion. Also claimed is a process for isolating such macrocyclicpolyethers in high yield from a solution containing them,by reaction with a disulphonate of the said formula to pre-cipitate the said complex, separating the complex and extractingthe separated complex with a solvent for the macrocyclicpolyether.