Synthetic Route of 14187-32-7. Let’s face it, organic chemistry can seem difficult to learn. Especially from a beginner’s point of view. Like 14187-32-7, Name is Dibenzo-18-crown-6. In a document type is Article, introducing its new discovery.
A number of phenyl and (4-phenylbutyl) derivates of 18-C-6 and 24-C-8 have been prepared: tetraphenyl-diene-18-crown-6 (TPDE-18-C-6), tetraphenyl-18-crown-6 (TP-18-C-6), tetraphenyldiene-24-crown-8 (TPDE-24-C-8), tetraphenyl-24-crown-8 (TP-24-C-8), and bis(4-phenylbutyl)-18-crown-6 (BPB-18-C-6).The ring formation reactions have been carried out by phase-transfer catalysis.All compounds are solids at room temperature except for the liquid BPB-18-C-6 wich represents a mixture of isomers.The syn- and anti-isomers of TP-18-C-6 and TP-24-C-8 have been isolated and identified by x-ray diffraction.The complex formation constants, determined by d. c. polarography in methanol/benzene (80:20 v/v), depend not only on the ring size but also on the number and kind of substituents as well as their steric arrangement.The derivatives of 18-C-6 form the most stable complexes with K+, Sr2+, Ba2+, and Pb2+.The derivatives of 24-C-8 prefer K+, Rb+, and Ba2+.
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