Catalysis continued allylation

One of the main applications of dendrimers is in catalysis allowing easy recycling of the homogeneous catalyst by means of nanofiltration. Carbosilane dendrimers functionalized with diphenylphosphine groups at the periphery have been synthesized and characterized. Palladium complexes of these dendrimers have been used as catalysts in the allylic alkylation reaction. These dendrimeric catalysts can be used in a continuous process using a membrane reactor.509... 

Many applications of surface modified maferials (such as in molecular electronics, separation science or continuous flow catalysis) require the use of mechanically and pressure-stable carriers. Grubbs et al. and later Nuzzo et al. reported on the surface modification of Si(lll). Conversion of surface Si - H into Si-allyl groups allowed them to pursue the grafting-from approach shown in Schemes [36,37]. The thickness of the polymer layer could be... 

Allyl complexes continue to find uses in polymerization catalysis. The new isoprene-co-l,3,7-octatriene P(IP-co-OT)] copolymers with controlled... 

Ag [39], or Au catalysis [40], most protocols continue to call for significant excess ofthe starting alkane relative to oxidant ((5 100 equiv) and the reactions are often limited in scope to benzylic or allylic positions and cyclic ethers. Readily available iminoiodi nanes of formula Phi = NR (R = Ts, Ns) are generally utilized as the source of nitrogen, but the employment of commercially available chloro or broma mine T [34, 37, 41 44] or arylazides [35, 45] has also been reported. 

This year has again emphasized the growing importance of organo-transition metal complexes in organic synthesis. In catalysed reactions the major advances have been in asymmetric catalysis with the first reports of chiral induction in catalytic epoxidation and further reports on improved catalysts for asymmetric hydrogenation and allylic alkylation. The formation of carbon-carbon bonds continues to attract attention, and several novel and potentially useful synthetic applications of organometallic complexes have been reported. 

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