1: With tris(dibenzylideneacetone)dipalladium (0); 2-(dicyclohexylphosphino)-2',4',6'-tri-i-propyl-1,1’-biphenyl in tetrahydrofuran 16 h; Heating; 2: With potassium hydroxide in tetrahydrofuran; methanol; diethyl ether 4 h; Heating; Further stages.;

<b>Multi-step reaction with 2 steps<br /> </b>1: 90 percent / DMAP; NEt₃ / CH₂Cl₂ / 8 h / 20 &deg;C<br />2: 12.4 g / CH₂Cl₂ / 12 h / 0 &deg;C<br /> <br /> &nbsp;