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Intermediate III of anti-hepatitis C drug boceprevir and its preparation method and application
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A technology of compound and general formula compound, applied in the field of preparation of anti-hepatitis C drug Boceprevir, which can solve problems such as reaction detection and intermediate control troubles, side reactions, etc.
Inactive Publication Date: 2016-06-22
SHANGHAI INST OF PHARMA IND CO LTD +1
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Problems solved by technology
However, the existing synthetic methods all have the same problem: since there is no obvious chromophoric group in the structure of each intermediate, the reaction detection and intermediate control are relatively troublesome.
In addition, there are exposed hydroxyl groups in the condensation step of strategy 1, which will inevitably lead to side reactions, which is also the case in the actual operation.
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Embodiment 1-9
[0056] Embodiment 1-9: R is the preparation of formula 1 compound of hydrogen
Embodiment 1
[0057] Embodiment 1: the preparation of compound B
[0058]
[0059] Compound A (5g, 20.6mmol) was dissolved in 40ml of DMF and added to a three-neck flask, cooled to -5°C; NaH (60%, 1.1g, 26.8mmol) was added in batches and stirred for 1h, and 40ml of BnBr was added dropwise at -5°C (4.2g, 24.7mmo) DMF solution, after the dropwise addition, stir at this temperature for 2h, add ice water to quench the reaction, extract with ethyl acetate, a small amount of multiple times, combine the organic phases, wash with saturated brine and anhydrousDrying over sodiumsulfate and distilling off the solvent gave a yellow oil, and column chromatography gave 6.2 g of compound B as a white solid, yield 90.4%, m / z (MH+) 334.16, 1HNMR (400MHz, CDCl3) δ1.31(t, 3H ),1.41-1.57(m,4H),1.64-1.74(m,2H),1.77(s,3H),1.96-2.06(m,2H),2.25-2.29(m,1H),3.95(d,1H ), 4.19-4.25(m,3H), 4.28(d,1H), 4.81(d,1H), 5.63(d,1H), 7.30-7.35(m,5H).
Embodiment 2
[0060] Embodiment 2: the preparation of compound C
[0061]
[0062] Compound B (5g, 15mmol), DMAP (0.37g, 3mmol) was dissolved in 60mlTHF, added (Boc) 2After O (6.88ml, 30mmol), the temperature was raised to reflux, and after reflux for about 8 hours, the temperature was lowered to room temperature, and 60ml of methanol and hydrazine hydrate (3g, 60mmol) were added to stir for 4 hours, and then 200ml of dichloromethane was added for dilution. Washed with saturated sodiumbicarbonate solution and saturated brine, dried over anhydroussodiumsulfate, evaporated the solvent to obtain a yellow oil, column chromatography obtained 4.4g of compound C as a white solid, yield 75.0%, m / z (MNa+) 414.06 ,1HNMR(400MHz,CDCl3)δ1.32(t,3H),1.44(s,9H),1.48-1.68(m,4H),1.78-1.87(m,2H),2.02-2.11(m,2H), 2.33-2.37(m,1H),3.98(m,1H),4.20-4.32(m,3H),4.43(d,1H),4.65(d,1H),4.81(d,1H),7.30-7.37( m,5H).
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Abstract
The present invention belongs to the technical field of preparation methods of anti-hepatitis C virus drugs. The structural formula of a compound F-2 disclosed in the invention is as follows. The compound is easy to prepare, the preparation method is easy to operate, and the yield of the compound is high. The compound can be used for synthesis of an anti-hepatitis C virusdrugBoceprevir, and a new concept and a new method for synthesis of the anti-hepatitis C virusdrugBoceprevir can be provided. Compared with the existing synthesis method, the compound prepared by the preparation method can be more conveniently detected due to ultraviolet chromophoric groups in the molecule of the compound, introduction of a benzyl group to a hydroxyl group avoids side reactions in a condensation step which are caused by hydroxyl nucleophilicity, and thus the preparation method has certain advantages over the existing synthesis method.
Description
technical field [0001] The invention relates to the technical field of preparation methods for anti-hepatitis CdrugBoceprevir. Background technique [0002] Globally, the infection rate of hepatitis C virus (HCV) is about 3%, and the total number of infected people is about 200 million. Because of the high infection rate of HCV and the serious potential complications such as liver cirrhosis and liver cancer, HCV is a serious threat to human life and health. According to the Simmonds naming system, HCV can be divided into six main genotypes, namely I-VI, and each type can be divided into several subtypes (such as Ia, Ib, IIa, IIb, IIIa, IIIb, etc.). There are about 40 million HCV-infected people in my country, 69% of which are type I infections (mainly type Ib). The current treatment for chronic hepatitis C is mainly the combination of pegylated interferon (PEG-IFNα) and ribavirin (RBV). This therapy fails to produce a sustained virological response in about 50% of patien...
Claims
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Application Information
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