1: With chloro-trimethyl-silane; zinc in CPME 0.333333 h; 2: ethyl bromoacetate in CPME T=30 - 40°C; 1.16667 h;

in further solvent(s) activation of Zn (5 percent HCl), washing (water, acetone, ether), addn. of alkene bromide (in dimethoxymethane);