Tryptophan hydroxylase-1 inhibitor ursolic acid derivatives as well as preparation method and application thereof
A technology of tryptophan hydroxylase and ursolic acid, which is applied in the direction of steroids, organic chemistry, drug combination, etc., to increase the bone density of the spine and prevent osteoporosis
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[0040] Example 1
[0041] For the preparation of compound 2, the reaction formula is:
[0042]
[0043] Weigh 13.25g (28.8mmol) of ursolic acid and dissolve it in 150.0mL N,N-dimethylacetamide or N,N-dimethylformamide at 90℃, and slowly add 10.0mL hydrogen peroxide / sodium tungstate / For the mixed solution of disodium hydrogen phosphate / sodium dihydrogen phosphate (12.5 / 0.5 / 0.2 / 0.2, molar equivalent), the time for dropping is controlled at about 1 hour. After reacting for one hour, it was cooled, poured into cold water, extracted with ethyl acetate, washed, dried with anhydrous sodium sulfate, and evaporated to remove the solvent to obtain 3.92 g of 3-carbonylursolic acid 2, yield: 86%. Product characterization, the data is: 1 H NMR(300MHz, CDCl 3 )δ: 5.30(s, 1H), 2.76(d, J=15.0Hz, 1H), 2.28–2.14(m, 3H), 2.09–1.97(m, 2H), 1.84–1.69(m, 3H), 1.64 -1.47(m, 6H), 1.33(d, J=2.8Hz, 3H), 1.31(s, 2H), 1.28(d, J=2.1Hz, 3H), 1.23(s, 3H), 1.18(s, 3H), 0.99(s, 3H), 0.97(s, 2H), 0.95(s, 4H), 0...
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[0443] Example 2 Specific experimental examples of ursolic acid derivatives:
[0444] 1) In vitro inhibition of 5-HT synthesis experiment
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