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  • 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)
  • 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)
  • 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)
  • 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)
  • atoms
  • Aze is a heterocyclic, 4 membered ring with nitrogen as its heteroatom (an azetidine), and a carboxylic acid group substituted on one of the ring carbon atoms. (wikipedia.org)
  • So far an alcohol and inorganic acid are linked via oxygen atoms. (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)
  • 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)
  • 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)
  • 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)
  • 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)
  • 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)
  • lactic
  • 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)
  • 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)
  • benzyl
  • Benzyl (Bn) group - Removed by hydrogenolysis Carbamate group - Removed by acid and mild heating. (wikipedia.org)
  • thereof
  • 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)
  • 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)