New approach to the synthesis of dibenzodiazacrown ethers by ring transformation of dibenzocrown ether
作者:Svetlana N. Dmitrieva、Marina V. Churakova、Artem I. Vedernikov、Lyudmila G. Kuz’mina、Sergey P. Gromov
DOI:10.1016/j.tet.2011.02.038
日期:2011.4
macrocycle of 4′,4″(5″)-dinitrodibenzo-18-crown-6 ethers under the action of MeNH2 or MeONa to give podands was studied. Structure of the aza podands was confirmed by X-ray diffraction. A new approach to the synthesis of previously unknown dinitrodibenzodiazacrown ethers based on one-step ring transformation of the cis isomer of dinitrodibenzo-18-crown-6 ether on treatment with aliphatic diamines was proposed