The preparation method of 1,7-bis(4-phenylhydroxyl)heptyl-3,5-diol ester
A technology of phenyl hydroxy and diol esters, which is applied in the field of compound synthesis, can solve the problems of high preparation cost, complicated process, and low yield, and achieve the effects of low raw material cost, simple process, and high yield
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[0036] 1, the preparation of 7-bis (4-phenylhydroxyl) heptyl-3,5-diol ester comprises the following steps:
[0037] (1) Using 2,4-pentanedione as a raw material, react to obtain product 2 (i.e. bisdemethoxycurcumin)
[0038] 8.0 g of 2,4-pentanedione was dissolved in 250 mL of anhydrous ethyl acetate, 2.78 g of diboron trioxide was added under stirring, and the reaction was carried out at room temperature for 30 min to obtain compound 1-1 (such as figure 1 Shown), without separation and purification directly proceed to the next step of addition reaction.
[0039] Add 36.8g of tributyl borate and 19.5g of p-hydroxybenzaldehyde to the reaction system, react for 40min, slowly add 2.9g of n-butylamine dropwise, after dropping, stir for 4h, and let stand for 12h. Add 150 mL of dilute hydrochloric acid dropwise to the reaction solution, stir for 1 hour, transfer to a separatory funnel, let stand to separate layers, discard the water layer, wash the ethyl acetate layer with water, c...
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