Cooligomerization of butadiene with

The palladium-catalyzed cooligomerization of butadiene with aldehydes provides a convenient synthesis of 2,5-divinyltetrahydropyran isomers... 

Linear oligomerization and telomerization of butadiene take place with nickel complexes in the presence of a proton source (7). In addition, cooligomerization of butadiene with functionalized olefins such as methacrylate is catalyzed by nickel complexes [Eq. (4)] (12, 13) ... 

Cooligomerization of butadiene with some olefinic compounds has been carried out. Two moles of allene reacted at 120°C with butadiene by the catalysis of Pd(PPh3)2 (maleic anhydride) to give cis- and trans-2-methyl-3-methylene-l,5,7-octatriene (119) in 39% yield (104) ... 

Linear cooligomerization of butadiene with styrene using ir-allylpalla-dium chloride and BF3 complex of PPh3 as a catalyst at 100°C in nitrobenzene or dichloromethane produced 1 -phenyl-1,4-hexadiene (124) (109) ... 

Butadiene-ethylene dimerization (example 3, Table II) has been shown to proceed via a croty 1-nickel complex formed by protonation (54). It should be observed at this point that it cannot be excluded that linear cooligomerization of butadiene with ethylene to give 1,4,9-decatriene... 

Scheme 5.24 Pd-catalyzed cooligomerization of butadiene with CO2 reaction mechanism...

Cooligomerization of propylene with butadiene gives two derivatives of CIS, rra/15-cyclodecatriene 76% 73 and 24% 74. 

A number of compounds with this ring system (163), including dispiro derivatives, are formed by the catalytic cooligomerization of ketazines or aldazines with butadiene (Scheme 186)249 reactions of this type are analogous to the catalytic cyclotrimerization of butadiene to cyclodecatriene.250... 

The cyclic cooligomerization of 2-vinylthiophene with butadiene, catalyzed by nickel complexes, has given (312) and (313) in a 1 2 ratio (78IZV1469). 

Functionalized alkenes are used for the cooligomerization. Phenyl-1,4,8-decatriene (104) is obtained by the Ni-catalysed 1 2 addition of styrene and butadiene [42a], Pd catalyst affords the 1 1 adduct [43], Co or Fe catalyst gives the 1 1 adducts 105 and 106 of methyl acrylate and butadiene [44,42a], The 1 1 adducts 107 and 108 are obtained by the Ru-catalyzed coupling of butadiene and acrylamide [45]. Reaction of methyl methacrylate affords the 1 2 adduct 109 with Ni—PhjP catalyst at 0°C, whereas the oligomer 110 is obtained at higher temperature [46],... 

The oligomerization and cooligomerization of conjugated dienes are representative reactions that proceed via transition-metal Jt-allyl intermediates. When (CsMesjRuCljt/ -butadiene) in dichloromethane was treated with an acetone solution of an equimolar amount of silver trifluoromethanesulfonate (AgOTf) in the presence of excess butadiene at ambient temperature, after which the mixture was allowed to react with carbon monoxide (1 atm), a cationic 1,5-cyclooctadiene carbonyl complex, [(C5Me5)Ru(CO)( -l,5-C8Hi2)]OTf, was isolated in 95% yield (Eq. 

Cooligomerization (hetero-oligomerization) of olefins and acetylenes with butadiene in the presence of nickel complexes prevents the formation of butadiene trimers. During hetero-oligomerization chain and cyclic compounds may be formed see equations (13.87) and (13.88). Dodeca-2,6,10-triene-l,12-diylnickel reacts with allene to give various products. Reaction (13.89) is an example. 

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