1: 2-methyl-cyclohexanone With lithium diisopropyl amide in tetrahydrofuran; hexane T=0°C; 0.5 h; 2: With phosphorochloridic acid diphenyl ester in tetrahydrofuran; hexane T=20°C; 2 h; 3: n-butyl-magnesium bromide With iron (III) acetylacetonate in tetrahydrofuran; 1-methyl-pyrrolidin-2-one; hexane T=-5 - 20°C; 2 h; chemoselective reactionFurther stages;

1: hexane / 1 h / 25 °C 2: 85percent phosphoric acid / heating under vacuum View Scheme

phosphoric acid heating under vacuum;

n-butyllithium; N,N,N',N,-tetramethylethylenediamine; iodine Yield given. Multistep reaction;

(i) nBuLi, (ii) /BRN= 1098260/; Multistep reaction;

(i) TsNHNH2, (ii) nBuLi, TMEDA, (iii) /BRN= 1098260/; Multistep reaction;