1: C7H17AlSi With copper(I) thiophene-2-carboxylate; 1,1-bis(3,5-dimethylphenyl)-N,N-bis((S)-1-(naphthalen-2-yl)ethyl)phosphinamine in diethyl ether T=-30°C; 0.25 h; Inert atmosphere; 2: 3-methyl-cyclohex-2-en-1-one in diethyl ether T=-30°C; 14 h; Inert atmosphere;

iodine; magnesium 1.) THF 0 deg C, 1 h; 2.) HMPA, 2 h, R.T.;

(i) tBuLi, (ii) CuI, (iii) /BRN= 1560601/; Multistep reaction;