Lithium Hexamethyldisilazide → HCID 56615310, Verbindung

Beteiligte Stoffe

Reaktionsschritte

Analogously to Example 21 D) 1) c), 30.9 g (99.26 mmol) of 5(S)-[1(S)-(Boc-amino)-2-cyclohexylethyl]-dihydrofuran-2-(3H)-one are reacted with 200 ml (200 mmol) of lithium bis(trimethylsilyl)amide 1M in THF and 34 g (104.8 mmol) of 4-benzyloxybenzyl iodide to yield the title compound. The title compound is purified by column chromatography (SiO2, hexane/ethyl acetate: 4/1 to 1/1) and crystallisation (hexane/ethyl acetate); TLC Rf (C)=0.33; tRet (IV)=20.41 min; FAB-MS (M+H+)=508.

Herkunft & Nachweise