Abstract
6-Methyl-1,3-oxazine-2,4(3H)-dione reacts with α,ω-dihalides under PTC conditions to give the 3,3′-(α,ω-dialkylene)bis[6-methyl-1,3-oxazine-2,4(3H)-diones]3, 11, 17. Further reactions of the latter with amines provide the bis(uracil) podands 5–10, 12–14, 18, 19 with different spacers between N-3 and functionalized alkyl appendages at N-1. The podands 5–10, 14, 18 and 19 are effective ionophores and 18 selectively extracts and transports Tl+ picrate, over Li+, Na+, K+ and NH4 picrates, across a chloroform membrane.
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