Telomerisation of Dienes

Torrente-Murciano L, Lapkin A, Nielsen DJ, Fallis I, Cavell KJ (2010) Telomerisation of long-chain dienes with alcohols using Pd(Imes)(dvds) catalyst. Green Chem 12 866-869... 

Pennequin I, Mortreux A, Petit F, Mentech J, Thiriet B (1994) Telomerisation of conjugated diene with sugar (derivs.) - by a reaction in aq. soln. and in the presence of a palladium catalyst and a ligand. FR 2693188... 

The Pd-catalyzed telomerisation of 1,3-dienes (1,3-hutadiene, isoprene) with addition of a nucleophile (telogen) is a 100%-atom economical and versatile reaction that generates few waste and can he applied to a variety of bio-based substrates, including polyols, carbohydrates and sugar alcohols (Fig. 9). 5 jg attractive access to hio-hased hydrotropes. 

Telomerisation of formamide with buta-1,3-diene with a catalyst derived from PdS+/pph3/Et3Al/CF3C02H gives 16.8%... 

Re3(C0)- 3(u-n, n -olefinyl)] complexes. The radical monocation formed by one-electron oxidation of [Pd2(PhgCp)2(y-PhC2Ph)] reacts with dppe and dienes to give [PdL2(PhgCp)] (l2=dppe, nbd, cod, cot). Octadienyl bridged (95) and related complexes have been synthesised and applied in the telomerisation of butadiene. 

Abstract Over the past decade significant advances have been made in the fields of polymerisation, oligomerisation and telomerisation with metal-NHC catalysts. Complexes from across the transition series, as well as lanthanide examples, have been employed as catalysts for these reactions. Recent developments in the use of metal-NHC complexes in a-olefin polymerisation and oligomerisation, CO/olefm copolymerisation, atom-transfer radical polymerisation (ATRP) and diene telomerisation are discnssed in subsequent sections. 

Telomerisation is an important, atom efficient reaction, which generates functionalised dienes from 1,3-diene feedstocks. The reaction, which typically employs a palladium based catalyst, comprises coupling two molecnles of a conjugated 1,3-diene... 

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