• inorganic acids
  • The hydrolysis of oximes proceeds easily by heating in the presence of various inorganic acids, and the oximes decompose into the corresponding ketones or aldehydes, and hydroxylamines. (wikipedia.org)
  • 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)
  • 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)
  • Acid-functional polymers prepared by the half-ester reaction of the hydroxyl groups of hydroxy-functional polymers with cyclic carboxylic anhydrides as taught herein are useful as co-reactants in a number of applications, such as chain extension or crosslinking of polyepoxides, polyamines, or polyhydroxy compounds. (google.com)
  • The reaction of cyclic carboxylic anhydrides, such as maleic anhydride, with hydroxy-functional molecules to produce a half-ester having an ester group and a carboxylic acid group has been known in the art. (google.com)
  • Ester names are derived from the parent alcohol and the parent acid, where the latter may be organic or inorganic. (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)
  • hydroxyl
  • An acid addition salt may be converted into the free compound by treatment with a base, e.g. a metal hydroxide, ammonia or a hydroxyl ion exchange preparation. (patentgenius.com)
  • 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)
  • 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)
  • 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)
  • salts
  • 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)
  • barium
  • 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)
  • 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)
  • organic
  • Thus, a resulting basic compound can be converted into a corresponding acid addition salt, for example by reacting it with an inorganic or organic acid, such as therapeutically useful acid, or with a corresponding anion exchange preparation, andisolating the desired salt. (patentgenius.com)
  • The chemical formulas of organic esters usually take the form RCO2R′, where R and R′ are the hydrocarbon parts of the carboxylic acid and the alcohol, respectively. (wikipedia.org)
  • Cyclic esters are called lactones, regardless of whether they are derived from an organic or an inorganic acid. (wikipedia.org)
  • synthesis
  • Woodhall et al (Synthesis of screening substrates for the directed evolution of sialic acid aldolase: towards tailored enzymes for thepreparation of influenza A sialidase inhibitor analogues. (patentgenius.com)
  • 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)
  • Hisashi Yamamoto first utilized (R)-BINOL as a chiral auxiliary in the asymmetric synthesis of limonene, which is an example of cyclic mono-terpenes. (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)
  • compound
  • 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)
  • weak acid
  • 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)
  • Dimethoxytrityl, [bis-(4-methoxyphenyl)phenylmethyl] (DMT) - Removed by weak acid. (wikipedia.org)
  • treatment
  • 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)