Polyazaphosphorus macrocycles. Synthetic approaches to symmetric or dissymmetric 18-, 20-, 22-, and 30-membered rings

Article abstract of DOI:10.1021/ja00170a027

High-yield synthetic routes to symmetric, functionalized or unfunctionalized, 18-, 20-, 22-, or 30-membered rings containing P-N-N linkages, i.e., 5c,c′, 5d,d′, 6b, 7a,c, 8b, and 9a,b, via [1 + 1], [2 + 2], or [3 + 3] condensation reactions involving phos