Carbon as solvent

The ene-yne CM of fatty acid-derived terminal alkenes with several alkyne derivatives was shown by Bruneau et al. [75], These reactions, which led to renewable conjugated dienes, were performed in a one-pot two-step procedure. In the first step, the ethenolysis of methyl oleate was performed in the presence of the first-generation Hoveyda-Grubbs catalyst (2.5 mol%) using dimethyl carbonate as solvent at room temperature. After completion of the ethenolysis (90% conversion), C4 (1 mol%) and the corresponding alkyne (0.5 equivalents with respect to olefins) were added and the reaction was run at 40°C for 2 h (Scheme 9). The desired dienes were thus obtained in high yields close to the maximum theoretical value (50%). Moreover, in order to maximize the formation of functional dienes, the same reaction sequence was applied to the diester obtained by SM of methyl oleate. In this way, the yield of functional dienes was increased up to 90% depending on the... 

Dihydro-5,10-dimethylphenazine (171) exhibits two successive reversible one-electron oxidation steps in acetonitrile (Fig. 9) or propylene carbonate as solvents.178 When the compound is electrolyzed in a more nucleophilic solvent, however, the second oxidation is... 

An optimized and reproducible synthesis in propylene carbonate as solvent and in the absence of olefin led to the isolation of ca. 880 mg of 3.8 0.6nm Ir(0) 2,ooo nanoclusters determined as [(Bu4N)] ii,oooNa s oooIt 2,ooo(P4W3o-Nb60i23) i,ooo(C4H603),s,ooo (C4H6O3 = propylene carbonate Scheme 4). ... 

Nanbu, N., K. Suzuki, N. Yagi et al. 2007. Use of fluoroethylene carbonate as solvent for electric double-layer capacitors. Electrochemistry 75 607-610. 

Nambu, N., D. Kobayashi, and Y. Sasaki. 2013. Physical and electrolytic properties of different cyclic carbonates as solvents for electric double-layer capacitors. Electrochemistry 81 814-816. 

Alkyl-substituted pyrroles are not easy to synthesize and relatively few reports on poly (3-alky Ipyrrolejs have been published [213-216]. These polymers are much more conductive than the corresponding poly(A -substituted-pyrrole)s and, under some selected experimental conditions (propylene carbonate as solvent and PF,- as counterions), even more conductive (270 S cm ) than PP itself [215]. 

Isosorbide was reacted with isobutylene under acidic conditions. With a recyclable Amberlyst-15 resin, almost complete conversion of isosorbide was obtained by bubbling isobutylene at 20 °C in dimethyl-carbonate as solvent for 6 hours. The diether vras finally obtained with 55% yield along with the two possible monoethers (Scheme 25). 

Propylene carbonate as solvent 20, 413 suppl. 26 Protection, blocking, masking... 

Table 2 Kinetic parameters for complex formation a/ Ni in propylene carbonate as solvent...

B. Schaffner, F. Schaffner, S.P. Verevkin, A. Bomer, Organic carbonates as solvents in synthesis and catalysis, Chem. Rev. 110 (2010) 4554-A581. 

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