methylene bis(iodozinc); tris(dibenzylideneacetone)dipalladium(0) chloroform complex; tris(4-methoxyphenyl)-phosphine in various solvent(s) T=-15°C; 2 h;

tetrahydrofuran; zinc; tris(dibenzylideneacetone)dipalladium(0) chloroform complex; tris(4-methoxyphenyl)-phosphine 1.) THF, 0 deg C, 1 h; r.t., 1 h, 2.) -15 deg C, 2 h; Yield given. Multistep reaction. Yields of byproduct given;