Klaus HahnHans P. RathHeinz KrapfIsidoor De GraveManfred WalterUSUS4369227 * 1982年3月10日 1983年1月18日 Basf Aktiengesellschaft Particulate styrene polymers containing blowing agentUS4369227 * Mar 10, 1982 Jan 18, 1983 Basf Aktiengesellschaft Which is an hydroxycarboxylic acid ester...
An ester is an organiccompoundwhere thehydrogenin the compound'scarboxyl groupis replaced with ahydrocarbongroup. Esters are derived from carboxylic acids and (usually) alcohol. While carboxylic acid has the -COOH group, the hydrogen is replaced by a hydrocarbon in an ester. The chemical formula ...
PROBLEM TO BE SOLVED: To provide a method of prevention against polymerization without inhibiting the reaction in the preparation of a carboxylic ester by reaction of an unsaturated aldehyde with an alcohol in liquid phase using a catalyst containing at least palladium. ;SOLUTION: This method of pr...
Is carboxylic acid an ester? An ester is an organic compound that isa derivative of a carboxylic acidin which the hydrogen atom of the hydroxyl group has been replaced with an alkyl group. ... The R′ group must be a carbon chain since a hydrogen atom would make the molecule a carboxyli...
One special therapeutic category of ethyl ester prodrugs is the angiotensin-converting enzyme (ACE) inhibitors, such as enalapril and perindopril, where one of the carboxylic acid groups is masked as an ethyl ester making the prodrug more lipophilic (Beaumont et al., 2003). Sacubitril (formerly...
Animals Rats, Inbred Strains Rats Mesenteric Arteries Potassium Chloride Calcium Body Weight Diabetes Mellitus, Experimental 3-Pyridinecarboxylic acid, 1,4-dihydro-2,6-dimethyl-5-nitro-4-(2-(trifluoromethyl)phenyl)-, Methyl ester Blood Glucose DOI: 10.1111/j.1524-6175.2004.03528.x 年份: 2004 ...
For annotated polyphenols, chemical taxonomy was assigned by hand using the following rules: phenolic acids contain a single aromatic ring with only hydroxyl and ether groups attached; benzoic acids contain a single aromatic ring with a carboxylic acid or ester attached in the alpha position of the...
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