sodium trimethyl-silanolate; Pd-((R,R)-Me-Duphos)(Ph)(I) in tetrahydrofuran; toluene T=21°C; 2 h;

1: methylphosphonous dichloride; 2,4,6-iPr3C6H2MgBr in diethyl ether T=-78°C; 2: Bromure de phenyl magnesium in tetrahydrofuran; diethyl ether T=-78 - 20°C; Further stages.;