Acetamido glucose devicative of indomethacin and its synthetic method and use
A technology of glucose derivatives and acetamido, which can be used in sugar derivatives, drug combinations, medical preparations containing active ingredients, etc., and can solve problems such as inhibiting etiology
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Embodiment 1
[0010] Example 1: 1-O-[1-(4-chloro-benzoyl)-5-methoxy-2-methyl-3-indole-acetoxy]-2-acetylamino-2-deoxy - Synthesis of α-D-glucose (hereinafter referred to as compound 1)
[0011] Step 1: Benzyl Protection
[0012]
[0013] Compound 3 Compound 4 Compound 5
[0014]
[0015] Compound 6 Compound 7
[0016] Dissolve 1mmol of acetylglucosamine (hereinafter referred to as compound 3) in 10mL of N,N-dimethylformamide (hereinafter referred to as DMF), react in ice bath for 30min, add 6mmol of benzyl bromide, stir for 10min, then add 9.3mmol of barium oxide , 1.7 mmol of barium hydroxide octahydrate and a catalytic amount of tetrabutylammonium iodide. The reaction was carried out in an ice bath for 5 h and at room temperature overnight. Add 15 mL of dichloromethane to dilute, filter with diatomaceous earth to remove insoluble matter, and wash the filter cake several times with dichloromethane. The filtrate was evaporated to dryness, dissolved in dichloromethane, washed twice...
Embodiment 2
[0028] Example 2: 6-O-[1-(4-chloro-benzoyl)-5-methoxy-2-methyl-3-indole-acetoxy]-2-acetylamino-2-deoxy - Synthesis of α-D-glucose (hereinafter referred to as compound 2)
[0029] Step 1: Benzyl Protection
[0030]
[0031] Compound 3 Compound 9
[0032] Stir the mixture of 0.01 mol of compound 3 and 20 mL of benzyl alcohol evenly, then add 0.1 mL of boron trifluoride ether, and heat to reflux. After the reaction was detected by TLC, the reaction solution was cooled to 0° C., and 120 mL of ether was slowly added, and a large amount of precipitates precipitated out. After standing overnight at 4°C, filter, wash the filter cake with ether, and dry to obtain 2.60 g of white solid 1-O-benzyl-2-acetylamino-2-deoxy-D-glucose (hereinafter referred to as compound 9). Rate 83.6%, R f 0.30 (chloroform:methanol=6:1). When the feeding amount of compound 3 is 0.01mol, the feeding amount of the benzyl alcohol is 5-50ml, and the feeding amount of the boron trifluoride ether i...
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