Reactions with bases

Reaction with base brings the alcohol function of the halohydrin into equilibrium with Its corresponding alkoxide... [Pg.677]

Isoxazoles are also rather stable to nucleophilic attack by OH at carbon. For reactions with base at a ring hydrogen atom, leading, for example, to ring opening of isoxazoles, see Section 4.02.1.7.1. [Pg.62]

Treatment of 3-hydroxy-l,2-benzisoxazole with benzyl bromide gave a mixture of O-and iV-benzyl compounds. The iV-benzyl compound gave a benzoxazin-4-one on reaction with base, via the intermediates shown in Scheme 88 (78CPB549). [Pg.56]

Isoxazole, 3-acetyl-4-chloro-5-methyl-oxidation, 6, 27, 53 Isoxazole, 3-acetyl-4,5-dimethyl-oxidation, 6, 27, 53 Isoxazole, 5-acetyl-3-methoxy-reactions, 6, 53 Isoxazole, 3-acyl-furazans from, 6, 417 nucleophilic attack, S, 93 reactions with bases, 6, 30... [Pg.685]

Isoxazolidine, 3-benzoyl-2-phenyl-reactions with bases, 6, 47 Isoxazolidine, 2-t-butyl-conformation, 6, 10 Isoxazolidine, 2-carbamoyl-3-hydroxy-... [Pg.689]

IsoxazoIidine-3,3-dicarboxylic acid, 2-methoxy-dimethyl ester reaction with bases, 6, 47 Isoxazolidine-3,5-diones synthesis, 6, 112, 113 Isoxazoli dines conformation, 6, 10 3,5-disubstituted synthesis, 6, 109 oxidation, 6, 45-46 PE spectra, 6, 5 photolysis, 6, 46 pyrolysis, 6, 46 reactions, 6, 45-47 with acetone, 6, 47 with bases, 6, 47 reduction, 6, 45 ring fission, S, 80 spectroscopy, 6, 6 synthesis, 6, 3, 108-112 thermochemistry, 6, 10 Isoxazolidin-3-ol synthesis, 6, 111 Isoxazolidin-5-oI synthesis, 6, 111... [Pg.690]

Oxadiazines herbicidal activity, 3, 1085 reactions with bases, 3, 1060 ring contraction, 3, 1065 ring opening, 3, 1061... [Pg.714]

Bu4N F , THF, 25°, 1 h, >90% yield. Fluoride ion is very basic especially under anhydrous conditions and thus may cause side reactions with base-sensitive substrates. ArOTBDMS ethers can be cleaved in the presence of alkyl OTBDMS ethers. ... [Pg.80]

Reaction of the cyclopentadienyl rhodium and iridium tris(acetone) complexes with indole leads to the species 118 (M = Rh, Ir) [77JCS(D)1654 79JCS(D)1531]. None of these compounds deprotonates easily in acetone, but the iridium complex loses a proton in reaction with bases (Na2C03 in water, r-BuOK in acetone) to form the ri -indolyl complex 119. This reaction is easily reversed in the presence of small amounts of trifluoroacetic acid. [Pg.137]

The mechanism involves the formation of anion 3 from ester 1 by reaction with base ... [Pg.55]

Hydrofluoric and hydrochloric acids undergo very similar reactions with bases such as OH- or C032- ions. The equations for these reactions look somewhat different because of the difference in acid strength. Thus for the reaction of hydrochloric acid with a solution of sodium hydroxide, the equation is simply... [Pg.562]

A second major use of sulfuric acid of commerce is in reactions with bases. In laboratory use it is diluted to a much lower concentration and can be used as a standard acid. A typical problem would be the titration of a base solution of unknown concentration using a sulfuric acid solution of known concentration. For example, What is the concentration of a sodium hydroxide solution if 25.43 ml of the NaOH solution just reacts with 18.51 ml of 0.1250 M HiSOt (to produce a neutral solution) ... [Pg.230]

Electrophilicity of the S02 and SO groups (reaction with bases/nucleophiles). [Pg.398]

Arts. 1, 2. or 3, depending on how complete its reaction with base is. [Pg.240]

An interesting sequence is provided by the reaction with base of the series of halides ... [Pg.82]

Aldehydes that possess H atoms on the carbon atom adjacent to the CHO group (the a-carbon atom) do not undergo the Cannizzaro reaction with base, as they undergo the aldol reaction (p. 224) very much faster. [Pg.217]

When the diamino salt 9 was treated with the 2,3-furandione 10, it gave the pyrido[l,2,-6][l,2,4]triazinone 11, whose reaction with base gave the respective monobenzoyl derivative (89CB1935). Cyclocondensation of 1,6-diaminopyridines 12 with diacetyl gave [73KGS1266 90JCR(S)186] pyridolf 1,2 b] 1,2,4]triazines 13. On the other hand, reaction with benzil was unsuccessful. [Pg.211]

Reduction of Disulfonium Dications. Reactions with Bases... [Pg.434]

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