摘要:
The invention relates to compounds of formula (I): wherein R is ethyl, and pharmaceutically acceptable salts, solvates or amino acid conjugates thereof. The compounds of formula (I) are useful as FXR agonists.
摘要:
N-Substituted glucamine compounds of formula I are effective in treatment of hepatitis infections, including hepatitis B and hepatitis C. In treating hepatitis infections the compounds of formular I may be used alone, or in combinatioin with another antiviral agent selected from among nucleosides, nucleotides, immunomodulators, immunostimulants or various combination of such other agents.
摘要:
Provided herein are novel and useful combretastatin A-4 prodrug salts that increase the solubility of combretastatin A-4, readily regenerate combretastatin A-4 in vivo under normal physiological conditions, and which produce physiologically tolerable products as a result of the regeneration of combretastatin A-4.
摘要:
The oxidation hair dye precursor composition contains from 0.005 to 20.0 percent by weight of at least one coupler compound and from 0.005 to 20.0 percent by weight of at least one developer compound, which includes at least one substituted 2-aminoalkyl-1,4-diaminobenzene compound of the formula (I): 1 New substituted 2-aminoalkyl-1,4-diaminobenzene compound of formula (I) are also described.
摘要:
The invention pertains to a process for the preparation of glyceraldehyde, or an acetal or a hemiacetal thereof, characterized in that 3-butene-1,2-diol is dissolved in a lower alkanol and is subjected to ozonolysis to obtain a 3-hydroperoxy-3-alkoxy-propane-1,2-diol, which is subjected to a reductive treatment to obtain a hemiacetal of glyceraldehyde, which optionally may be converted into glyceraldehyde or an acetal or hemiacetal thereof, and to a process wherein the hemiacetal of glyceraldehyde is converted to a 3-aminopropane-1,2-diol derivative, by subjecting the hemiacetal of glyceraldehyde to a reductive treatment in the presence of ammonia or a primary or secondary amine. Preferably, the hemiacetal of glyceraldehyde is subjected to a reductive treatment in the presence of an amine with the formula R1R2NH, wherein R1 and R2 independently are hydrogen or an alkyl group with 1-18 carbon atoms, or R1 and R2 together with the nitrogen atom to which they are bonded form a 5- or 6-membered ring, to give a compound with the formula R1R2NnullCH2nullCHOHnullCH2OH, wherein R1 and R2 have the previously given meanings
摘要:
Preparation of alkanolamines having improved color quality by treating the alkanolamine with hydrogen in the presence of a hydrogenation catalyst at elevated temperature, by using, as hydrogenation catalyst, a heterogeneous catalyst comprising Re, Ru, Rh, Pd, Os, Ir, Pt and/or Ag and a support material chosen from the group consisting of activated carbon, alpha-aluminum oxide, zirconium dioxide and titanium dioxide, where the catalyst, in the case of activated carbon as support material, has a cutting hardness of at least 10 N, a side crushing strength of at least 30 N or a compressive strength of at least 25 N.
摘要:
The invention provides a process for synthesizing alkanolamines and/or alkyleneamines by reacting either an alkane, an alkene, or both with a source of oxygen and a source of nitrogen and, optionally, additional hydrogen to convert the alkane and/or alkene by selective partial oxidative amination to at least one of the desired end products. The invention further provides a regenerable catalyst for use in synthesizing alkanolamines and/or alkyleneamines by selective partial oxidative amination of alkanes and/or alkenes.
摘要:
The present invention aims to provide a novel sphingosine analogue, which is useful as an intermediate for syntheses of novel lipid derivatives such as sphingolipid derivatives and the like that can regulate the effects of sphingolipid. The present invention relates to a sphingosine analogue represented by the general formula (I) described below. In the formula, as for Q1, Q2 and Q3, Q1 and Q2, which are the same or different each other, are hydrogen, alkyl groups having 1-4 of carbon atoms, acyl groups having 2-5 of carbon atoms, or protecting groups of the amino group, and Q3 is a hydrogen or a protecting group of the hydroxyl group; or Q2 and Q3 make up an isopropylidene group and Q1 is a hydrogen or a protecting group of the amino group. Q4 and Q5, which are the same or different each other, are hydroxyl groups, acyl groups having 2-5 of carbon atoms, —O—Q6, or hydrogen; or Q4 and Q5 make up a covalent bond. Q6 is a protecting group of the hydroxyl group. X1 is —COOH, —CONH2, —CO—Q7, —CH2OH, or —CH2O—Q8. Q7 is a protecting group of the carboxyl group, and Q8 is a protecting group of the hydroxyl group.
摘要:
2-Amino-1,3-propanediol compounds of the formula (I) ##STR1## wherein R is an optionally substituted straight- or branched carbon chain, an optionally substituted aryl, an optionally substituted cycloalkyl or the like, and R.sup.2, R.sup.3, R.sup.4 and R.sup.5 are the same or different and each is a hydrogen, an alkyl, an aralkyl, an acyl or an alkoxycarbonyl, pharmaceutically acceptable salts thereof and immunosuppressants comprising these compounds as active ingredients.The 2-amino-1,3-propanediol compounds of the present invention show immunosuppressive action and are useful for suppressing rejection in organ or bone marrow tranplantation, prevention and treatment of autoimmune diseases or as reagents for use in medicinal and pharmaceutical fields.
摘要:
1-aminopropanediol-2,3 containing 2-aminopropanediol-1,3 of less than 0.30% by weight can be prepared by the present purification process, which comprises distilling a l-aminopropanediol-2,3 containing at least 0.3% of 2-aminopropanediol-1,3 based on the weight of 1-aminopropanediol-2,3 with a distillation column, said distillation column having low pressure loss.