potassium hydroxide in n-heptane T=100°C; 4 h;

water; silver nitrate T=120°C; 4 h;

toluene-4-sulfonic acid in n-heptane 48 h; Heating;

1: 60 percent / BuLi / hexane; petroleum ether; tetrahydrofuran / 5 h / Heating 2: KOH View Scheme

in dichloromethane under N2, Schlenk technique; the Si-compd. is dissolved in CH2Cl2 and cooled down to 0°C, then a soln. of SnCl4 in CH2Cl2 is added dropwise under stirring, after warming up to room temp. the mixt. is refluxed overnight; solvent is removed in vac., recrystn. from CH2Cl2; elem. anal.;

in n-heptane 48 h; Heating;

1: 60 percent / BuLi / hexane; petroleum ether; tetrahydrofuran / 5 h / Heating 2: KOH View Scheme

potassium hydroxide