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Midbody VIII for anti-hepatitis C medicine Boceprevir as well as preparing method and application thereof
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A compound and post-reaction technology are applied in the field of preparation of anti-hepatitis C drug Boceprevir, which can solve problems such as side reactions, reaction detection and intermediate control troubles, etc.
Inactive Publication Date: 2014-07-23
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
[0076] Embodiment 1-9: R is the preparation of formula 1 compound of hydrogen
Embodiment 1
[0077] Embodiment 1: the preparation of compound B
[0078]
[0079] 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 evaporating 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
[0080] Embodiment 2: the preparation of compound C
[0081]
[0082] Compound B (5g, 15mmol), DMAP (0.37g, 3mmol) was dissolved in 60mlTHF, added (Boc) 2 After 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 invention relates to the technical field of a preparing method of an anti-hepatitis C medicineBoceprevir. A compound VIII (B) provided by the invention has a structural formula shown as the attached drawing. The operation of the compound preparation is simple and convenient, and the yield is higher. The compound can be used for synthesizing the anti-hepatitis C medicineBoceprevir, and a new thought and method can be provided for synthesis of the anti-hepatitis C medicineBoceprevir. In addition, as ultraviolet chromophoric groups are contained in molecules of the compound, the detection is more convenient than that of an ordinary synthesis method, and side reaction caused by oxhydryl nucleophilicity in a condensation step is avoided through the introduction of benzyls on oxhydryls. Compared with the synthesis method in the prior art, the preparing method provided by the invention has certain advantages.
Description
technical field [0001] The invention relates to the technical field of preparation methods for anti-hepatitis Cdrug Boceprevir. Background technique [0002] Globally, the infection rate of hepatitis Cvirus (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 of chronic hepatitis C is mainly the combination of pegylated interferon (PEG-IFNα) and ribavirin (RBV), which fails to produce sustained virological response in about 50% of HCV type I patie...
Claims
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Application Information
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