Tildipirosin 1,4-dioxane solvate and preparation method thereof
A solvent compound, a new technology of tedirox, applied in the preparation of sugar derivatives, organic chemistry methods, chemical instruments and methods, etc., can solve the problems of dust, cumbersome process, high energy consumption, etc., to avoid coalescence and dust. Phenomenon, the effect of good particle fluidity and uniform particle size distribution
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Embodiment 1
[0029] Preparation of tedirosin 1,4-dioxane solvent compound
[0030] At 20°C, add 40g of 1,4-dioxane into the crystallizer and stir to keep the system in a good mixing state. Add 4g of Tiderol new raw material into the crystallizer in four times, 1g each time, with an interval of 20 minutes between each addition, after adding the raw material, continue to stir the solution for 0.5h, filter the solid, and dry to obtain the product.
[0031] The product is subjected to X-ray powder analysis, and its diffraction pattern is as attached figure 1 As shown, the spectrum has initial peaks at 2θ=6.06° and 8.42°, and the strongest peak at 2θ=18.60. See the table below for specific data:
[0032]
[0033]
[0034] Carry out TGA thermogravimetric analysis to the product in this embodiment, thermogravimetric analysis is nitrogen purge environment, and heating rate is 10 ℃ / min, obtains analysis result curve as attached figure 2As shown, the heating weight loss temperature range ...
Embodiment 2
[0036] Preparation of tedirosin 1,4-dioxane solvent compound
[0037] Keep the temperature constant at 40°C, add 30g of 1,4-dioxane into the crystallizer, add and stir to keep the system in a good mixing state. Add 10g of Tiderol new raw material to the crystallizer in five times, 2g each time, and the interval between each addition is 40min. After adding the raw material, continue to stir the solution for 3h, filter the solid, and dry to obtain the product. X-ray powder diffraction pattern of the product and attached figure 1 Consistent, with the same peak spectrum position and shape, the relative intensity values of the peaks are basically the same, the spectrum starts at 2θ=6.0° and 8.4°, and the strongest peak at 2θ=18.6°; TGA weight loss curve and attached figure 2 similar, with a loss of 10.9% in size, crystal shape and attached image 3 The same as a short rod.
Embodiment 3
[0039] Preparation of tedirosin 1,4-dioxane solvent compound
[0040] With a constant temperature of 30°C, add 35g of 1,4-dioxane into the crystallizer and stir to keep the system in a good mixing state. Add 5 g of the new raw material of Tiderol into the crystallizer in 3 times, with an interval of 30 minutes between each addition. After adding the raw material, continue to stir the solution for 1 hour, filter the solid, and dry to obtain the product. X-ray powder diffraction pattern of the product and attached figure 1 Consistent, with the same peak spectrum position and shape, the relative intensity values of the peaks are basically the same, the spectrum starts at 2θ=6.0° and 8.4°, and the strongest peak at 2θ=18.6°; TGA weight loss curve and attached figure 2 similar, with a loss of 10.6% in size, crystal shape and attached image 3 Same as rod.
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