Group reaction with organometallic

We begin, however, with a brief consideration of a group of phosphorus compounds of significance for their utility in the formation of carbon-phosphorus bonds via reaction with organometallic reagents in displacement reactions. 

Reactions with Organometallic Compounds of Main Group... 

Aryl tellurium trichlorides are easily converted to symmetrical or unsymmetrical diaryl tellurium dihalides via reactions with organometallic compounds (see p. 549). Trimethyl(aryl)silanes transfer only the aryl group to tellurium1. 

The above level of diastereoselectivity is noteworthy because the protected form (alkylether) of 159 fails to show 1,3 asymmetric induction in the reaction with organometallics such as cuprates 104a). As in other cases of 1,3 asymmetric induction 75a), the results are not easy to rationalize. It is likely that the reactions are initiated by deprotonation of the hydroxyl group. An intramolecular transfer of the... 

There is an extensive chemistry of substituted sulfur fluorides of the types RSF3 and RSF5 examples of the former were mentioned previously. The SF5 derivatives bear considerable resemblance to CF3 derivatives, with the principal difference that in reactions with organometallic compounds the SF5 group is fairly readily reduced, whereas the CF3 group is not. 

Hetaryl sulfoxides, reactions with organometallic reagents 86PS(27)13. Heterocycles, functional group transformations using Pd compounds ... 

Phosphine oxides (31) bearing two or three pyridyl groups undergo ligand displacement on reaction with organometallic reagents to give substituted... 

Two available examples are nucleophilic reactions with organometallic cations and with activated bicyclobutanes. Sweigart and co-workers (9, 10) showed that a linear correlation is obtained between the log k values for the reactions of nucleophiles (Nu) with various organic cations and the transition metal complexes of the same cations. The latter reactions resemble SN2 reactions if the carbon-metal bond cleavage is considered as a departure of the leaving group ... 

These examples have shown that supported group 8 metals modified by reaction with organometallic compounds are very useful catalysts with numerous applica-... 

Reaction with Organometallic Derivatives. Similarly, the lesser reactivity of NIS compared with NBS allows it to be used for the s)uithesis of vinyl iodides by iodination of vinylaluminum intermediates in the presence of reactive alkenic groups. NIS has also been found to be an excellent reagent for the oxidative cyclization of dipeptide dianions to 8-lactams (eq 1). ... 

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