dilithium tetrachlorocuprate in tetrahydrofuran; diethyl ether T=-72°C; 1 h;

1: (9Z,12Z,15Z)-9,12,15-octadecatrienyl triflate With dilithium tetrachlorocuprate in tetrahydrofuran; diethyl ether T=-50°C; 0.333333 h; 2: n-butyl-magnesium bromide in tetrahydrofuran; diethyl ether T=-78 - -10°C; 1.33333 h; Further stages.;