• alkyl
  • A cleaning composition with a limited number of natural ingredients contains alkyl polyglucoside, a 2-hydroxylcarboxylic acid, and a fragrance containing lemon oil or d-limonene. (google.com.au)
  • In chemistry, an ester is a chemical compound derived from an acid (organic or inorganic) in which at least one -OH (hydroxyl) group is replaced by an -O-alkyl (alkoxy) group. (wikipedia.org)
  • The drawn 2-formylbenzoic acid is in equilibrium (ring-chain tautomerism) with the cyclic lactol 3-hydroxyphthalide, which forms with alkyl- and aryl-Grignard compounds substituted phthalides. (wikipedia.org)
  • ester
  • iii) reacting said polyalkylene oxide containing said terminal carboxylic acid with a biologically active nucleophile under conditions sufficient to form a biologically active conjugate whereby said polyalkylene oxide is linked to said biologically active nucleophile by an ester linkage. (google.com)
  • The preparation of an imidazoline substituted in the 2-pos ition by lower aliphatic hydrocarbon radicals is well-described in the literature and is readily carried out by reaction between a monocarboxylic acld or ester or amide and a diamine or polyamine, containing at least one primary amino group, arid at least one secondary amino group or a second primary amino group separ ted. (google.com)
  • Ester names are derived from the parent alcohol and the parent acid, where the latter may be organic or inorganic. (wikipedia.org)
  • For example, triphenyl phosphate is the ester derived from phosphoric acid and phenol. (wikipedia.org)
  • The definition of inorganic acid ester that feature inorganic chemical elements links between alcohols and the inorganic acid - the phosphorus atom linking to three alkoxy functional groups in organophosphate - can be extended to the same elements in various combinations of covalent bonds between carbons and the central inorganic atom and carbon-oxygen bonds to central inorganic atoms. (wikipedia.org)
  • carbonyl
  • After the step involving the hydride is complete, the acetal is removed (by reacting it with an aqueous acid), giving back the original carbonyl. (wikipedia.org)
  • yield
  • Optically inactive Aze was obtained in small yield from γ-aminobutyric acid by α-bromination, followed by removal of hydrogen bromide from the intermediate γ-amino-α-butyric acid and ring closure by treatment with a barium hydroxide solution. (wikipedia.org)
  • An optically active Aze was obtained by treatment of αγ-diaminobutyric acid dihydrochloride with a mixture of nitrous and hydrochloric acids to yield γ-amino-α-chlorobutyric acid, followed by elimination of hydrogen chloride and cyclization by treatment with barium hydroxide. (wikipedia.org)
  • With hydrazine or alkylhydrazines, 1(2H)-phthalenazinones are obtained under acid catalysis with K10-montmorillonite and microwave irradiation in quantitative yield. (wikipedia.org)
  • ethyl
  • The present invention relates to an improved process for preparation of l-[9//-carbazol-4-yloxy]-3-[ {2-(2-(methoxy)phenoxy)-ethyl} -amino]-propan-2-ol. (allindianpatents.com)
  • l-[9i/-carbazol-4-yloxy]-3-[{2-(2-(methoxy)phenoxy)-ethyl}-amino]-propan-2-ol, a compound of formula 1, is a well known drug with INN name, carvedilol having antihypertensive effect. (allindianpatents.com)
  • United States Patent No. 4503067 in example 5 teaches the preparation of l-[N-{benzyl}-2-({2-(methoxy)phenoxy)-ethyl}-amino]-3-[9i/-carbazol-4-yloxy]-propan-2-ol, a compound of formula 6 (wherein R1 is benzyl, referred to as N-benzyl carvedilol herein), which is the penultimate intermediate for preparation of carvedilol, by reaction of 4-(oxiranylmethoxy)-9H-carbazole, a compound of formula 2 with a secondary amine, viz. (allindianpatents.com)
  • simplest
  • Esters derived from the simplest carboxylic acids are commonly named according to the more traditional, so-called "trivial names" e.g. as formate, acetate, propionate, and butyrate, as opposed to the IUPAC nomenclature methanoate, ethanoate, propanoate and butanoate. (wikipedia.org)
  • polymer
  • The resultant polymer carboxylic acids are of sufficient purity so that expensive and time containing purification steps required for pharmaceutical grade polymers are avoided. (google.com)
  • c) adding to said acid-functional polymer a stabilizing amount of a low-molecular weight alcohol solvent under conditions which will not cause substantial reaction of the solvent and the acid-functional polymer. (google.com)
  • oxide
  • The present invention is directed to methods of preparing high purity polyalkylene oxide carboxylic acids. (google.com)
  • The methods include reacting a polyalkylene oxide such as polyethylene glycol with a t-butyl haloacetate in the presence of a base followed by treatment with an acid such as trifluoroacetic acid. (google.com)
  • Ethylene oxide was first reported in 1859 by the French chemist Charles-Adolphe Wurtz, who prepared it by treating 2-chloroethanol with potassium hydroxide: Cl-CH2CH2-OH + KOH → (CH2CH2)O + KCl + H2O Wurtz measured the boiling point of ethylene oxide as 13.5 °C (56.3 °F), slightly higher than the present value, and discovered the ability of ethylene oxide to react with acids and salts of metals. (wikipedia.org)
  • reaction
  • The Ponzio reaction (1906) concerning the conversion of m-nitrobenzaldoxime to m-nitrophenyldinitromethane with dinitrogen tetroxide was the result of research into TNT-like high explosives: In the Neber rearrangement certain oximes are converted to the corresponding alpha-amino ketones. (wikipedia.org)
  • An alternative approach to (racemic) 3-substituted phthalides with high yields is opened up by the reaction of 2-carboxybenzaldehyde and β-keto acids in the presence of base 4-anisidine in glycerol as solvent. (wikipedia.org)
  • More recently, 2-formylbenzoic acid became due to its reactivity of some interest as versatile molecular building block in multicomponent reactions, for example the Ugi reaction, for the synthesis of heterocyclic annellated aromatics. (wikipedia.org)
  • Functionalized isoindolinones are accessible in high yields in a three-component reaction with 2-formylbenzoic acid and 2-bromoanilines by palladium-catalyzed carbonylation. (wikipedia.org)
  • synthesis
  • Triethylorthoformate (HC(OC2H5)3) is derived, in terms of its name (but not its synthesis) from orthoformic acid (HC(OH)3) and ethanol. (wikipedia.org)
  • The production of chemical substances that do not normally occur in nature has long been tried, such as the synthesis of sulfuric and nitric acids attributed to the controversial alchemist Jābir ibn Hayyān. (wikipedia.org)
  • fatty
  • Glycerides, which are fatty acid esters of glycerol, are important esters in biology, being one of the main classes of lipids, and making up the bulk of animal fats and vegetable oils. (wikipedia.org)
  • group
  • from the first rimary amino group b two can ba at ms. (google.com)
  • 6 . The composition of claim 1 , wherein the 2-hydroxycarboxylic acid is selected from the group consisting of citric acid, lactic acid, and glycolic acid. (google.com.au)
  • 19 . The method of claim 18 , wherein the 2-hydroxycarboxylic acid is selected from the group consisting of citric acid, lactic acid, and glycolic acid. (google.com.au)
  • or R 5 and R 6 are taken together to form --CH--CH═CH--CH--, the process comprising deprotecting a compound of the formula: ##STR00060## where P represents an amino-protecting group, to provide a compound of formula I, or a salt thereof. (patentsencyclopedia.com)
  • 5. The functionalized support material of claim 4 wherein the mild conditions comprise a treatment selected from the group consisting of exposure to moderate acid, exposure to weak acid, exposure to moderate base, exposure to weak base, photolysis, thiolysis, palladium-catalyzed nucleophilic transfer, rhodium-catalyzed nucleophilic transfer, hydrogenation and fluoridolysis. (google.ca)
  • Benzyl (Bn) group - Removed by hydrogenolysis Carbamate group - Removed by acid and mild heating. (wikipedia.org)
  • Stable
  • At room temperature, acetaldehyde (CH3CH=O) is more stable than vinyl alcohol (CH2=CHOH) by 42.7 kJ/mol: Overall the keto-enol tautomerization occurs slowly but is catalyzed by acids. (wikipedia.org)