1H‐1,2,4‐Diazaphosphole über 2‐Phosphaallylchloride

Abstract

P‐Atome in der gleichen Bindungssituation wie in Phosphabenzol haben die 1H‐1,2,4‐Diazaphosphole 1. Es überrascht daher nicht, daß sich 1 auf einem zweistufigen Weg herstellen läßt, der im ersten Schritt an die klassische Phosphabenzol‐Synthese erinnert.

Facile Synthesis of Phosphaamidines and Phosphaamidinates using Nitrilium Ions as an Imine Synthon

“…So far, only four examples were prepared by reacting an imidoyl chloride [13,14] with alkali-metal phosphides [15] or silylphosphanes. [16,17] Two additional reports mention the synthesis of bis(imino)phosphanes, but without conclusive analytical data. [15b, 18] Moreover, convenient synthetic access to the phosphorus analogues of the highly versatile and much used amidinate ligands, [19] that is, the anionic phosphaamidinates D,…”

Molecules that we made: An essay on phosphorus chemistry

“…The phosphaallylic ions are reactive both at the phosphorus and at the adjacent carbon atoms [149]. Most important are their reactions with hydrazines and hydroxylamine, yielding diazaphospholes, such as the prototypical 57, and oxazaphospholes, such as 58 [146,149].…”

“…By a different route, phosphaallylic ions such as 56, became generally accessible [146,147]. A heterocyclic version reported in 1964 by Karl Dimroth [148] was one of the first examples of two-coordinate phosphorus.…”

Bis[N-(trimethylsilyl)iminobenzoyl]phosphanide des Lithiums und Zinks - Synthese sowie NMR-spektroskopische, strukturelle und quantenchemische Untersuchungen

“…1984 gelangten dann Schmidpeter u. a. [6,7] durch Umsetzung der (a-Chloralkyliden)dimethylammonium-chloride mit Tris(trimethylsilyl)phosphan unter Chlortrimethylsilan-Eliminierung zu den acyclischen Vertretern dieser Substanzklasse (II), deren Stickstoffatome nun nicht mehr in einen Heterocyclus eingebunden sind.…”