methanol; [(N,N′-bis[2,6-diisopropylphenyl]imidazolin-2-ylidene)CuCl]; sodium t-butanolate in tetrahydrofuran T=-15°C; 24 h; Inert atmosphere; regioselective reaction;

NaOC(CH3)3; CH3OH; [(N,N′-bis[2,6-diisopropylphenyl]imidazolin-2-ylidene)CuCl] in tetrahydrofuran 1.0 molpercent Cu-complex, alkyne, diborane, NaOC(CH3)3, CH3OH, THF, -15°C, 24 h, N2 atm.; 87:13 ratio of isomers;

bis-triphenylphosphine-palladium(II) chloride; potassium phenolate; triphenylphosphine in toluene

1: chloro-trimethyl-silane; sodium iodide / water; acetonitrile 2: bis-triphenylphosphine-palladium(II) chloride; potassium phenolate; triphenylphosphine / toluene View Scheme