Phosphonation photostimulated

Et or Bu) and the phosphonation of iodoaromatics with dialkyl phosphonates, although in this case with poorer yields (better results of the dialkyl arylphosphonates are obtained by photostimulation). Chemical oxidation (using AgNO -peroxodi-sulphate) and anodic oxidation of aromatics in the presence of trialkyl phosphites produces dialkyl arylphosphonates in good yields. The Cul-catalysed arylation of dialkyl (cyanomethyl)-phosphonates affords dialkyl (a-cyanobenzyl)phosphonates. ... 

The synthesis of multidentate Lewis acids is of great interest [102]. The photostimulated reactions of [o-(diethoxy-phosphoryl)-phenyl]-phosphonic acid diethyl ester with Me3Sn- ions in liquid ammonia affords the disubstitution product 6>-Z f -trimethylstannanyl-benzene 29a in 67% yield [103]. Under the same experimental conditions, 2,2/-Zus(diethylphosphoxy)-1,1 -binaphthyl 30 affords the disubstitution product 31 in high yields (Sch. 28) [103]. 

Savignac and coworkers drew a comparison between the transition metal-catalysed and the photostimulated phosphonation reactions and concluded that the latter process produced more uniformly good results, and also showed that the addition of one equivalent Nal to mixtures of aryl bromide and metal dialkyl phosphite greatly accelerated the phosphonation process". ... 

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