in tetrahydrofuran; N,N-dimethyl-formamide

1: With lithium; 4,4'-di-tert-butylbiphenyl in tetrahydrofuran T=0°C; Wittig rearrangement; 1 h; 2: With water in tetrahydrofuran T=0 - 20°C;

With  chloro-trimethyl-silane in  tetrachloromethane T=20°C; 2 h;