Crown Ethers with Diaminobenzene and Benzofuroxane Moieties

2 Crown Ethers with Diaminobenzene and Benzofuroxane Moieties 

The condensation of 2,3-diaminobenzo-15-crown-5 2a with i-franr-chloroethanedial dioxime proceeds with the formation of the (15-crown-5)eno[g]quinoxaline-2(l//)-one oxime 11, which when heated in absolute ethanol at 60 °C in the presence of C0CI2 for 4 h results in 2,2 -azobis[(15-crown-5-eno[g]quinoxaline)] 12 

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Scheme 5.2 Synthesis of crown ethers with diaminobenzene and benzofuroxane moieties...

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