Controlled Oligomerization of Lewis Acid/Base-Stabilized Phosphanylalanes [Kontrollierte Oligomerisierung von Lewis-Säure/Base-stabilisierten Phosphanylalanen]

Abstract

PAls should stick together: The cyclo-trimer 2 is obtained by H2 elimination of Lewis acid/base-stabilized parent compound of the phosphanylalanes 1. The elimination is controlled by fine tuning the temperature and solvent conditions. A subsequent H2 elimination produces the ladder compound 3. Compounds 2 and 3 are the first of a new class of Group 13/15 compounds which show no additionally donor-acceptor bonds within the framework.