triethylsilane; acetyl-bromide; 2,2'-azo-bisisobutyronitrile; tri-n-butyl-tin hydride; stannous bromide 1) CH2Cl2, 0 deg C, 2h, 2) benzene, 0.5h, reflux; also with 2) LiAlH4; Yield given. Multistep reaction;

1: (trimethyl)silylmethyllithium With copper(l) iodide; tributylphosphine in diethyl ether; pentane T=-78°C; Metallation; 0.333333 h; 2: 1,1-dimethoxy-1-phenylbutane With boron trifluoride diethyl etherate in diethyl ether; pentane T=-78 - -20°C; Peterson-type olefination; 1 h;