1.1: 1H-imidazole / dichloromethane / 2 h / 0 - 20 °C / Inert atmosphere 2.1: N,N,N',N',N'',N''-hexamethylphosphoric triamide; n-butyllithium / tetrahydrofuran; hexane / -78 - 0 °C / Inert atmosphere; Molecular sieve 2.2: 5 h / 0 °C / Inert atmosphere; Molecular sieve 3.1: sodium tetrahydroborate; hydrogen; nickel diacetate; ethylenediamine / methanol / 20 °C / Inert atmosphere 4.1: carbon tetrabromide; triphenylphosphine / dichloromethane / 3 h / 0 - 20 °C / Inert atmosphere 5.1: tetrabutyl ammonium fluoride / tetrahydrofuran / 12 h / 0 °C / Inert atmosphere 5.2: Inert atmosphere 6.1: chromium(VI) oxide; periodic acid / water; acetonitrile / 0 °C 7.1: methanol; diethyl ether / 0.33 h / 0 °C / Inert atmosphere View Scheme

1.1: N,N,N',N',N'',N''-hexamethylphosphoric triamide; n-butyllithium / tetrahydrofuran; hexane / -78 - 0 °C / Inert atmosphere; Molecular sieve 1.2: 5 h / 0 °C / Inert atmosphere; Molecular sieve 2.1: sodium tetrahydroborate; hydrogen; nickel diacetate; ethylenediamine / methanol / 20 °C / Inert atmosphere 3.1: carbon tetrabromide; triphenylphosphine / dichloromethane / 3 h / 0 - 20 °C / Inert atmosphere 4.1: tetrabutyl ammonium fluoride / tetrahydrofuran / 12 h / 0 °C / Inert atmosphere 4.2: Inert atmosphere 5.1: chromium(VI) oxide; periodic acid / water; acetonitrile / 0 °C 6.1: methanol; diethyl ether / 0.33 h / 0 °C / Inert atmosphere View Scheme

1: chromium(VI) oxide; periodic acid / water; acetonitrile / 0 °C 2: methanol; diethyl ether / 0.33 h / 0 °C / Inert atmosphere View Scheme