sodium hydride in tetrahydrofuran Heating;

1.1: N,O-dimethylhydroxylamine hydrochloride; methyllithium / tetrahydrofuran / 0 - 20 °C 1.2: tetrahydrofuran / 0 - 20 °C 2.1: 3.11 g / imidazole / tetrahydrofuran / 2 h 3.1: tetrahydrofuran / 0 - 20 °C 4.1: 0.55 g / tetrabutylammonium fluoride / tetrahydrofuran / 15 h 5.1: 73 percent / sodium hydride / tetrahydrofuran / Heating View Scheme

1: 3.11 g / imidazole / tetrahydrofuran / 2 h 2: tetrahydrofuran / 0 - 20 °C 3: 0.55 g / tetrabutylammonium fluoride / tetrahydrofuran / 15 h 4: 73 percent / sodium hydride / tetrahydrofuran / Heating View Scheme

1.1: 85 percent / m-chloroperbenzoic acid; acetic acid / CH2Cl2 / 24 h / Heating 2.1: N,O-dimethylhydroxylamine hydrochloride; methyllithium / tetrahydrofuran / 0 - 20 °C 2.2: tetrahydrofuran / 0 - 20 °C 3.1: 3.11 g / imidazole / tetrahydrofuran / 2 h 4.1: tetrahydrofuran / 0 - 20 °C 5.1: 0.55 g / tetrabutylammonium fluoride / tetrahydrofuran / 15 h 6.1: 73 percent / sodium hydride / tetrahydrofuran / Heating View Scheme

1: tetrahydrofuran / 0 - 20 °C 2: 0.55 g / tetrabutylammonium fluoride / tetrahydrofuran / 15 h 3: 73 percent / sodium hydride / tetrahydrofuran / Heating View Scheme