Triphenylphosphine → 1,4,7,10,13,16-Hexaoxacyclooctadecane-2,8,14-trione

Beteiligte Stoffe

Reaktionsschritte

To a stirred solution of triphenylphosphine (4.68 g, 17.85 mmol) in a dichloromethane/toluene 1/1 mixture (1.5 l) was added at room temperature DEAD (8.2 ml, 44.63 mmol). Reaction mixture stirred at room temperature for 10 min then a toluene solution of hydroxyacid 12 (1.18 g, 3.57 mmol) was added. Mixture was stirred at room temperature and concentrated. Careful flash chromatography on silica gel (EtOAc/pentane 1/1 then 2/1 then EtOAc 100%) afforded cyclic 14 as a white solid (670 mg, 60%).

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