Abstract
N,N´-Bis(2-bromobenzyl) diaza-15-crown-5 and -diaza-18-crown-6 ethers were obtained in high yields. Palladium-catalyzed amination of these compounds with equimolar amounts of linear polyamines and oxadiamines afforded a large number of macrobicyclic compounds. It was found that the structure of starting compounds is crucial for the formation of the target cryptands and that their yields can substantially be increased by using larger catalyst loadings.
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