Targeting large phosp(III)azane macrocyles [{P(μ-NR)}2(LL)]n (n≥ 2)

The condensation reactions of the dimer [ClP(μ-NR)]2 (7) with organic diacids [LL(H)2], possessing linear orientations of their organic groups, result in the formation of phospha(III)zane macrocyles of the type [{P(μ-NR)}2(LL)]n of various sizes. The series of macrocycles [{P(μ-NtBu)}2{1,5-(NH)2C10H6}]3 (1), [{P(μ-NCy)}2(1,5-O2C10H6)]n [n = 3 (2a); n = 4 (2b)], [{P(μ-NtBu)}2{1,4-(NH)2C6H4}]4 (3), [{P(μ-NtBu)}2(1,4-O2C6H4)]3 (4), [{P(μ-NCy)}2(1,4-O2C6H4)]3 (5) and [{P(μ-NtBu)}2{(NH)C6H4OC6H4(NH)}]2 (6) can be related to classical organic frameworks, like calixarenes.