1: 0.1 N (CH3)3CONa / diethyl ether; 2-methyl-propan-2-ol / 20 h / Ambient temperature 2: 61 percent / 10percent H2SO4 / methanol / 24 h / Ambient temperature 3: 1) mesitol, molecular sieve, 2) K, aniline / 1) pyridine, anh. methylcyclohexane, 10 h, irradiation, 2) liq. NH3 4: 64 percent / diisobutylaluminiumhydride / toluene View Scheme

1: 0.1 N (CH3)3CONa / diethyl ether; 2-methyl-propan-2-ol / 20 h / Ambient temperature 2: 61 percent / 10percent H2SO4 / methanol / 24 h / Ambient temperature 4: 77 percent / conc. HCl / pyridine / 1 h / 210 °C View Scheme

1: 0.1 N (CH3)3CONa / diethyl ether; 2-methyl-propan-2-ol / 20 h / Ambient temperature 2: 61 percent / 10percent H2SO4 / methanol / 24 h / Ambient temperature 3: 1) mesitol, molecular sieve, 2) K, aniline / 1) pyridine, anh. methylcyclohexane, 10 h, irradiation, 2) liq. NH3 View Scheme

1: 0.1 N (CH3)3CONa / diethyl ether; 2-methyl-propan-2-ol / 20 h / Ambient temperature 2: 61 percent / 10percent H2SO4 / methanol / 24 h / Ambient temperature View Scheme

1: 1.) 80 percent NaH; 2.) 10 percent H2SO4 / 1.) DME, parrafin oil, 3.5 h, reflux; Et2O, -20 deg C, 30 min; 2.) MeOH, 24 h 3: 84 percent / mol. sieve, 2-butanone, aluminium isopropylate / benzene / 12 h / Heating View Scheme

1: 1.) 80 percent NaH; 2.) 10 percent H2SO4 / 1.) DME, parrafin oil, 3.5 h, reflux; Et2O, -20 deg C, 30 min; 2.) MeOH, 24 h 3: 84 percent / mol. sieve, 2-butanone, aluminium isopropylate / benzene / 12 h / Heating 4: 1.) LDA; 2.) 6 percent HCl / 1.) THF, 2.5 h; 2.) MeOH, 60-70 deg C, 3 h View Scheme

1: 0.1 N (CH3)3CONa / diethyl ether; 2-methyl-propan-2-ol / 20 h / Ambient temperature 2: 61 percent / 10percent H2SO4 / methanol / 24 h / Ambient temperature 4: 49.4 mg / Cr(VI)-oxid, 95percent acetic acid / acetic acid / 2 h / Ambient temperature View Scheme

1: 1.) NaH, 2.) H2SO4 / 1.) DME, paraffin oil; Et2O; 2.) MeOH 2: 1.) 2,4,6-trimethylphenol, pyridine; 2.) oxalic acid / 1.) methylcyclohexane, 13.5 h, 98 deg C, irradiation 3: 99 percent / LiAlH4 / diethyl ether 4: 62 percent / K, aniline, NH3 / tetrahydrofuran / 1 h 5: 76 percent / 2-butanone, aluminium isopropylate, mol. sieve / benzene 6: 0.16 g / LDA / tetrahydrofuran View Scheme