1.1: n-butyllithium; chloro-trimethyl-silane; triethylamine; diisopropylamine / tetrahydrofuran; hexanes / -78 - 20 °C / Inert atmosphere 1.2: 120 °C / Inert atmosphere 2.1: methanol; diethyl ether; benzene / 1.5 h / 6 - 20 °C / Inert atmosphere 3.1: pyridine; hydrogen fluoride / tetrahydrofuran / 24 h / 0 - 20 °C / Inert atmosphere 4.1: pyridinium chlorochromate / dichloromethane / 2.5 h / 0 - 20 °C / Inert atmosphere; Celite 5.1: toluene / 110 °C / Inert atmosphere; Molecular sieve; Sealed tube 5.2: 5.58 h / 0 - 20 °C / Molecular sieve 6.1: PHT / tetrahydrofuran / 72 h / 20 °C / Inert atmosphere 6.2: 12 h / 20 °C / Inert atmosphere 7.1: sodium tetrahydroborate / isopropyl alcohol / 77 h / 20 - 50 °C / Inert atmosphere View Scheme