Cl[CH:2]([CH3:12])[CH2:3][CH2:4][CH2:5][C:6]([O:8][CH:9]([CH3:11])[CH3:10])=[O:7].[Cl:13]C(CCC)CC(OC(C)C)=O>CO>[Cl:13][CH2:12][CH2:2][CH2:3][CH2:4][CH2:5][C:6]([O:8][CH:9]([CH3:11])[CH3:10])=[O:7]A solution of 10.5 gm(0.03 mol) of diamine 15, 6.2 gm(0.03 mol) of isopropyl 5-chlorohexanoate, and 10.0 gm of MeOH was charged to the flask and heated to reflux. After 90 hours, 1.0 gm(5 mmol) of isopropyl 3-chlorohexanoate was added to the mixture. At least 5% amine was present after refluxing 6 hours and the heating was stopped. The crude product was removed of volatiles by rotary evaporation and washed until all of the residue was removed leaving 15 gm(94%) of Quat 7.
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