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

Abstract

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-N^tBu)}₂{1,5-(NH)₂C₁₀H₆}]₃ (1), [{P(μ-NCy)}₂(1,5-O₂C₁₀H₆)]_n [n = 3 (2a); n = 4 (2b)], [{P(μ-N^tBu)}₂{1,4-(NH)₂C₆H₄}]₄ (3), [{P(μ-N^tBu)}₂(1,4-O₂C₆H₄)]₃ (4), [{P(μ-NCy)}₂(1,4-O₂C₆H₄)]₃ (5) and [{P(μ-N^tBu)}₂{(NH)C₆H₄OC₆H₄(NH)}]₂ (6) can be related to classical organic frameworks, like calixarenes.