[CH2:1]([PH:7](=[O:13])[O:8][CH2:9][CH2:10][CH2:11][CH3:12])[CH2:2][CH2:3][CH2:4][CH2:5][CH3:6].[CH2:14]=[O:15]>>[CH2:1]([P:7]([CH2:14][OH:15])(=[O:13])[O:8][CH2:9][CH2:10][CH2:11][CH3:12])[CH2:2][CH2:3][CH2:4][CH2:5][CH3:6]The title compound was prepared from n-hexylphosphinic acid, n-butyl ester and paraformaldehyde according to the method described in Procedure 31. Purification by chromatography, eluting with dichloromethane containing 5% methanol, gave an oil.
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