Organophosphorverbindungen, 51¹⁾ Phosphatriafulvene – Phosphaalkene mit inverser Elektronendichte²⁾

Abstract

Organophosphorus Compounds, 51 1) . – Phosphatriafulvenes – Phosphaalkenes with Inverse Electron Density 2) Peterson olefination of the sterically hindered cyclopropenones 1 with the lithium phosphides 2 yields the so far unknown phophatriafulvenes 3 and 4 , which possess inverse electron densities. They are characterized by transition metal complex formation (→ 7 , 8 ). Acylation of 3a with the carboxylic acid chlorides 11 leads to a great variety of P ‐acylphosphatriafulvenes 13a ‐ s . They partly dimerize under formation of the 1,3‐diphosphacyclobutanes 13 ⇌ 14 .