摘要:
Disclosed is an acid addition salt of donepezil, wherein acid counterion is selected from the group consisting of pamoic acid, cypionic acid, camphor sulfonic acid, enanthic acid, fusidic acid, gluceptic acid, gluconic acid, lactobionic acid, lauric acid, valeric acid, Dibenzoyl-D-Tartaric acid and terephthalic acid. Disclosed is a process for the preparation and pharmaceutical composition comprising the same. More specifically, disclosed is concerned with the pamoate acid addition salts of donepezil. Disclosed also is long acting formulation comprising the acid addition salt of donepezil and process for the preparation thereof.
摘要:
Derivatives of anacardic acid having antimicrobial properties and method for preparing said derivatives. The antimicrobial properties include bacteriostatic and bacteriocidal activity.
摘要:
This invention relates to novel compounds useful as modulators of the KCNQ channel, to pharmaceutical compositions comprising these compounds, and to methods of treatment herewith.
摘要:
Hydroxy aromatic acids are produced in high yields and high purity (>95%) from halogenated aromatic acids in a reaction mixture containing a copper source and a ligand that coordinates to copper.
摘要:
Multifunctional alcohols, polyols derived from cardanol containing at least 3 hydroxyl groups are disclosed. Such alcohols allow for synthesis of multifunctional crosslinkers such as acrylates, epoxies, and vinyl ethers and flame retardants such as >phosphates. The multifunctional alcohols or polyols can be used in polyurethanes and polycarbonates. The multifunctional crosslinkers can be used in optical coating and waveguide compositions to increase curing speed and crosslink density. The multifunctional phosphates can be used in flame resistant plastics as the highly pendant phosphorus containing phosphate non-halogen flame retardant additives.
摘要:
A method for producing 2,6-dihydroxybenzoic acid, which comprises heating an aqueous solution which contains a mixture of 2,6-dihydroxybenzoic acid and 2,4-dihydroxybenzoic acid and has a pH value of 4 or more, to selectively decompose 2,4-dihydroxybenzoic acid, and separating 2,6-dihydroxybenzoic acid from the decomposition reaction mixture.
摘要:
The present invention provides a method for preparing solid p-disodium hydroxybenzoate which is characterized by comprising the steps of reacting phenol, carbon tetrachloride in an amount of 0.9 to 1.2 moles per mole of phenol and sodium hydroxide in an amount of 7 to 20 moles per mole of phenol prior to the reaction in an aqueous liquid containing 10 to 40% by weight of p-disodium hydroxybenzoate and/or sodium chloride in the presence of a transition metal powder in an amount of 0.01 to 1.00% by weight based on the weight of a reaction system at a reaction temperature of 50.degree. to 150.degree. C.; cooling the resulting reaction mixture to a level of -20.degree. to +20.degree. C.; and separating said p-disodium hydroxybenzoate therefrom.
摘要:
New polysubstituted derivatives of naphtalene.These derivatives correspond to the following formula: ##STR1## in which: R.sub.1 to R.sub.4 is H or CH.sub.3R.sub.5 is ##STR2## or (iv) the radical: 2-oxazolinyl m is 0 or 1R.sub.8 is H, alkyl, OR.sub.11, R.sub.11 being H, alkyl or ##STR3## R.sub.13 being alkyl or aryl or R.sub.8 is ##STR4## when m=1, r' and r" representing H, alkyl mono or polyhydroxyalkyl, aryl or a heterocycle when they are taken together, R.sub.9 is H or alkyl, R.sub.10 is H, alkyl and the acetals of the said compounds, ##STR5## --OR.sub.14, R.sub.14 being H, alkyl, mono or polyhydroxyalkyl, aryl or aralkyl a rest of a sugar or represents ##STR6## P being 0, 1, 2, or 3 R.sub.6 represents a hydrogen atom or a lower alkyl radical,R.sub.7 represents H, alkyl, halogen, hydroxyl, sulfydryl, alkoxy, alkylthio, acyloxy, acylthio, acylamino or primary, secondary or tertiary amino and the salts of the said compounds.These compounds find an application in the cosmetic and pharmaceutical fields.
摘要:
p-Hydroxyphenylacetic acid is prepared by reduction of p-hydroxymandelic acid with HI in the presence of red phosphorus. According to a preferred embodiment, the reaction is carried out in one vessel in which the mandelic acid is prepared in situ from phenol and glyoxylic acid.
摘要:
In preparing or reacting alkanolamines, especially at high temperatures, the use of substantially nickel-free alloy steels prevents corrosion and discoloration.