39results about How to "Convenient source of synthetic starting materials" patented technology

The invention relates to application of diamine formyl dehydrogenated silybin serving as a medicament for curing viral hepatitis B, in particular to application of a flavonolignan of dehydrogenated silibinin esters of which the ring A and the ring E have diamine formyl-methoxyl substituents or pharmaceutically acceptable salts thereof in preparation of a medicament for clearing HBsAg and HBeAg and a medicament for inhibiting HBV DNA replication. The flavonolignan of dehydrogenated silibinin esters of which the ring A and the ring E have diamine formyl-methoxyl substituents has extremely high HBsAg and HBeAg inhibiting activities; when the flavonolignan of dehydrogenated silibinin esters of which the ring A and the ring E have diamine formyl-methoxyl substituents is at a concentration of 20 mu g / ml, the inhibition rates of the HBsAg and the HBeAg are respectively 94.4 percent and 95.7 percent which exceed 5.9 times and 5.7 times those of a positive control alpha-interferon; and simultaneously the inhibition rate of the HBV DNA is 99.7 percent when the flavonolignan of dehydrogenated silibinin esters of which the ring A and the ring E have diamine formyl-methoxyl substituents is at the same concentration, and the inhibition activity of the flavonolignan of dehydrogenated silibinin esters of which the ring A and the ring E have diamine formyl-methoxyl substituents is higher than that of lamivudine and the alpha-interferon. In summary, the flavonolignan of dehydrogenated silibinin esters of which the ring A and the ring E have diamine formyl-methoxyl substituents or the pharmaceutically acceptable salts thereof can be expected for preparing non-nucleoside medicaments for clearing the HBsAg and the HBeAg, inhibiting the HBV DNA replication, and curing the hepatitis B virus infection diseases.

The invention relates to application of B-ring ethyoxyl flavanonol in preparing medicaments for treating hepatitis B viruses, in particular to application of a compound as shown in a formula (1) or a medicinal salt thereof in preparing medicaments for clearing away hepatitis B virus surface antigens (HBsAg) and hepatitis B e-antigen (HBeAg) and medicaments for inhibiting the duplication of hepatitis B virus desoxyribonucleic acid (HBV DNA). The compound or the medicinal salt thereof has extremely obvious activity on inhibiting the HBsAg and the HBeAg, and in the presence of a concentration of20 microgram / milliliter, the intensities for clearing away the HBsAg and the HBeAg of the compound or the medicinal salt thereof are respectively 99.8 percent and 48.5 percent and are 6.2 times and 2.7 times of that of alpha-interferon which is a positive control medicament. More importantly, in the presence of the concentration, the inhibition ratio of the compound or the medicinal salt thereof to the HBV DNA is 64.7 percent, and the activity is 1.7 times of that of the alpha-interferon. Accordingly, the flavone lignan or the medicinal salt thereof can be expected to be used for preparing non-nucleoside medicaments for treating infectious diseases of the hepatitis B viruses.

The invention relates to application of flavone lignan (+ / -) Scutellaprostin A in preparing medicaments for treating viral hepatitis type B, in particular to a compound with the formula (1) or pharmaceutically-acceptable salts thereof for preparing medicaments for clearing HBsAg and HBeAg and suppressing HBV (Hepatitis B Virus) DNA replication. In the invention, the intensities of the compound for clearing the HBsAg and the HBeAg under the concentration of 20 micrograms / milliliter respectively reach 81.8 percent and 81.9 percent, which are respectively 5.1 times and 4.8 times as high as the corresponding activity of alpha-interferon used as a positive contrast medicament; and what is more exciting, when the compound has the concentration, the compound performs a suppression ratio higher than 81 percent, and the value is also higher than that of both lamivudine and alpha-interferon. Accordingly, the flavone lignan or the pharmaceutically-acceptable salts can be expectably used for preparing nucleoside medicaments for clearing the HBsAg and the HBeAg, suppressing the HBV DNA replication and treating HBV infected diseases.

The invention relates to application of a B / E ring substituted silybin for preparing a medicament for treating virus hepatitis B, in particular to the application of a B ring ethoxy and E ring methoxy substituted silybin ester or medicinal salts thereof for preparing the medicament for eliminating hepatitis B virus surface antigens and hepatitis B e antigen and inhibiting HBV and DNA replication. The medicament has accurate activity of inhibiting HBsAg and HbeAg, and respective intensity of 18.5% and 23.0% in eliminating HBsAg and HbeAg at the concentration of 100 microgram / ml, which exceeds the positive control medicament of an alpha-interferon; and meanwhile, 23.3% inhibition ratio on HBV and DNA is displayed at the concentration of 100 microgram / ml; and therefore, flavonoid lignans or a medicinal salt thereof are proved to have the efficacy of inhibiting HbsAg, HbeAg, HBV and DNA. The application is predictably used for preparing the non-nucleoside medicament for eliminating HBsAg and HbeAg, inhibiting HBV and DNA replication and treating hepatitis B virus infectious diseases.

The invention relates to application of flavanonol lignanoid in preparing an antiviral hepatitis B medicine, in particular to application of angle flavanolignan or pharmaceutically acceptable salts thereof in preparing a medicine which can be used for eliminating hepatitis B e antigen HBeAg, inhibiting HBV DNA replication and treating hepatitis B virus infection diseases. The flavanolignan has a certain HBeVg activity inhibition, the HBeAg elimination intensity of the flavanolignan is higher than that of a positive control first-line medicine as lamivudine in light concentration and is equivalent to that of alpha-interferon of 1000 unit / ml, and meanwhile, under the concentration of 20 microgram / ml, the flavanolignan displays an inhibition ratio which is larger than 45 percent for HBV DNA.The pharmacodynamics result indicates the application of the flavanolignan or the pharmaceutically acceptable salts thereof in preparing the medicine as expected for eliminating hepatitis B e antigen, inhibiting HBV DNA replication and treating hepatitis B virus infection diseases.

The invention relates to application of ring B ethyoxyl silybin in preparing medicaments for treating viral hepatitis B, in particular to application of ring B ethyoxyl substituted silybin ester or a pharmaceutically acceptable salt thereof in preparing medicaments for clearing away HBsAG (Hepatitis B Surface Antigen) and HBeAg (Hepatitis B e Antigen) and suppressing the HBV (Hepatitis B Virus) DNA replication. The compound has strong activity on suppressing the HBsAG and the HBeAg, and in the presence of a concentration of 20 micrograms / milliliter, the intensities for clearing the HBsAg and the HBeAg are respectively 64.6 percent and 44.8 percent which are 4.0 times and 2.7 times of that of alpha-interferon which is a positive control medicament. In the presence of the concentration, the suppression rate of the compound on the HBV DNA is 58.1 percent which is 1.5 times of the corresponding activity of the alpha-interferon. Accordingly, the flavonolignan or the pharmaceutically acceptable salt thereof are indicated to simultaneously have strong efficacy on suppressing the HBsAg, the HBeAg and the HBV DNA and can be expected to be used for preparing non-nucleoside medicaments for treating HBV infection diseases.

The invention relates to application of ring A substituted silybin ester in preparing medicaments for treating viral hepatitis B, in particular to application of silybin ester flavonolignan substituted by ethoxycarbonyl methyl on the ring A or a pharmaceutically acceptable salt thereof for preparing medicaments for reducing the hepatitis B virus surface antigen (HBsAg), suppressing the HBV (Hepatitis B Virus) DNA replication and treating HBV infection diseases. The flavonolignan has quite obvious activity on suppressing the HBsAg, and in the presence of a concentration of 100 micrograms / milliliter, the intensity of the flavonolignan for clearing away the HBsAG exceeds that of alpha-interferon which is a positive control medicament by 3.3 times. Meanwhile, in the presence of a concentration of 20 micrograms / milliliter, suppression ratio of the compound to the HBV DNA is close to 60 percent. The pharmacodynamical results indicate that the flavonolignan or the pharmaceutically acceptable salt thereof can be expected to be used for preparing the medicaments for treating the HBV infection diseases.

The invention relates to application of E-ring demethoxy-silibinin for preparing medicaments for treating viral hepatitis B, and particularly to application of compound in formula (1) and pharmaceutically acceptable salt thereof for preparing medicaments for clearing HBsAg and HBeAg and suppressing HBV DNA replication. The invention has extremely superactive activity for suppressing the HBsAg andHBeAg; in the presence of the concentration of 20 microgram per millilitre, the intensities for clearing the HBsAg and HBeAg are 95.0% and 34.4% respectively, which are 5.9 and 2.0 times corresponding activity of a positive control medicament alpha-interferon; and it should be noticed that the suppression ratio of the medicament for HBV DNA at the concentration is about 91.5%, which is 13% higher than lamivudine and 2.4 times alpha-interferon suppression activity. In summary, the flavonolignans or pharmaceutically acceptable salt thereof can be prospectively used for preparing non-nucleoside medicaments for clearing the HBsAg and HBeAg, suppressing HBV DNA replication and treating hepatitis B virus infection disease.

The invention relates to application of B / E bi-methoxy silybin in preparing medicaments for treating viral hepatitis B, in particular to application of silybin ester substituted by the methoxy on the ring B and the ring E or a pharmaceutically acceptable salt thereof in preparing medicaments for clearing away HBsAg (Hepatitis B Surface Antigen) and HBeAg (Hepatitis B e Antigen) and suppressing the HBV (Hepatitis B Virus) DNA replication. The B / E bi-methoxy silybin has strong activity on suppressing the HBsAg and the HBeAg, and in the presence of a concentration of 20 micrograms / milliliter, the intensities for clearing away the HBsAg and the HBeAg are respectively 43.9 percent and 43.7 percent which are 2.7 times and 2.6 times of that of alpha-interferon which is a positive control medicament. In the presence of the concentration, the suppression ratio on the HBV DNA is 68.6 percent, and the suppression activity is 1.8 times of that of the alpha-interferon. Accordingly, the flavone lignan or the pharmaceutically acceptable salt thereof are indicated to simultaneously have the effects of strongly suppressing the HBsAG, the HBeAg and the HBV DNA and can be expected to be used for preparing the non-nucleoside medicaments for treating HBV infection diseases.

The invention relates to an application of benzo-phenylpropanoids in preparing drugs for treating viral hepatitis B, in particular to two benzo-phenylpropanoids or application of pharmaceutically acceptable salt thereof in preparing drugs for inhibiting the replication of hepatitis B virus desoxyribonucleic acid (HBV DNA) and treating hepatitis B virus infection diseases. The two benzo-phenylpropanoids definitely inhibit the activity of the HBV DNA, have the replication inhibition activity on the HBV DNA at high dose (100 microgrammes / milliliter) of 1.3-2.2 times higher than the inhibition activity at the highest concentration (10000 units / milliliter) of an alpha-interferon and belong to an efficient non-nucleoside natural product inhibiting the hepatitis B viruses; pharmacodynamics results show the application of the benzo-phenylpropanoids or the pharmaceutically acceptable salt thereof capable of preparing the drugs for inhibiting the replication of the HBV DNA and treating the hepatitis B virus infection diseases in anticipation.

The invention relates to application of benzyl-containing flavonoid lignan in preparation of a medicament for treating hepatitis B, in particular to application of flavonoid lignan and pharmaceutically-acceptable salt thereof in preparation of the medicament for eliminating hepatitis B e antigen, inhibiting hepatitis B virus desoxyribonucleic acid (HBV DNA) replication and treating viral hepatitis B. The flavonoid lignan can inhibit the activity of hepatitis B virus e antigen (HBeAg); the inhibition intensity of the flavonoid lignan under low concentration of 20 micrograms per milliliter is much higher than that of a positive control front-line medicament lamivudine and an interferon; and the compound with the concentration of 20 micrograms per milliliter displays an inhabitation ratio over 50 percent on the HBV DNA, so that the application of the flavonoid lignan in preparation of the medicament for eliminating the hepatitis B e antigen and the medicament for inhibiting the HBV DNA replication and treating hepatitis B viral diseases can be anticipated.