Allyl bromide → Rocuronium Bromide

Beteiligte Stoffe

Reaktionsbedingungen

Reaktionsschritte

In a three neck flask equipped with heated mantle, thermometer and magnetic stirrer, was charged dichloromethane (20 mL), sodium carbonate (2.0 g, 0.081 mol) and slowly allyl bromide (0.692 mL, 0.00818 mol) at 20-22° C. under N2 atmosphere. The mixture was stirred during 5 min and 2β-(4-morpholinyl)-16β-(1-pyrrolidinyl)-5α-androstan-3α,17β-diol 17-acetate (Compound VIII) (2.0 g, 4.09×10−3 mol) was added. The resulting mixture was stirred during 5-10 min. The resulting solution was stirred under reflux for 22 hours. The mixture was then cooled to room temperature (20-25° C.) and filtered (membrane 0.45 microns) under nitrogen atmosphere. The solvent was removed under vacuum keeping the temperature below 20° C. The foam obtained was dissolved with dichloromethane (10 mL) and concentrated under vacuum keeping the temperature below 20° C.; this procedure was repeated twice. Once again the residue was dissolved at room temperature under nitrogen atmosphere in dichloromethane (22 mL).

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