Citation: Li LIN, Jin Liang GUO, Yong LI. SYNTHESES OF TWO NEW UNICARBON-CHAIN BIS (BENZO-15-CROWN-5) COMPOUNDS[J]. Chinese Chemical Letters, ;1991, 2(10): 751-752. shu

SYNTHESES OF TWO NEW UNICARBON-CHAIN BIS (BENZO-15-CROWN-5) COMPOUNDS

Department of Chemistry, Tsinghua University, Beijing, 100084

Received Date: 26 June 1991

Carbonyl bis (4'-benzo-15-erown-5) has been synthesized by heating the mixture of benzo-15-crown-5 and 4'-earboxybenzo-15-crawn-5 in polyphosphoric aeid (PPA), and bis (4'-benzo-15-crown-5) carbinol is obtained by reducing carbonyl bis (4'-benzo-15-crown-5) with sodium borahydride. A use ful method is provided to synthesize various types of symmetrical and unsymmetrical bis (crown ether)s.
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