1: N'-(4,4-dimethylcyclohexylidene)-4-methylbenzene-1-sulfonohydrazide With n-butyllithium; N,N,N',N,-tetramethylethylenediamine in hexane T=-78 - 25°C; 3 h; Inert atmosphere; 2: 2-isopropoxy-4,4,5,5-tetramethyl-1,3,2-dioxaborolane in hexane T=-78°C; 2 h; Inert atmosphere;

1.1: N,N,N',N,-tetramethylethylenediamine; n-butyllithium / hexane / 3 h / -78 - 25 °C / |Inert atmosphere 1.2: 2 h / -78 °C / |Inert atmosphere 2.1: sodium periodate; ammonium acetate / water; acetone View Scheme

methyllithium