1: With tributyl-amine; triphenylphosphine; palladium diacetate in toluene T=110°C; 60 h; 2: With hydrogenchloride in water; ethyl acetate; toluene 0.166667 h;

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.; 91:9 ratio of isomers;