Di acetate

See Acetotetrazacydooctane Acetyltetrozonononediol-di acetate, Trinitro. See under Acetyldiacetozytetrazanonane Acetyltriozacyclohexane and Derivatives. See Aceto tri a zacy clo h ex an e... 

Scheme 2.29 In situ aminocarbonylations with Mo(CO)6 as the carbon monoxide source (palladacycle = frans-di(acetate)bis[o-(di-o-tolylphosphino)benzyl]dipalladium(II)).

Catalytic systems containing Te02, HBr and AcOH have been used industrially by Oxirane to convert ethylene to ethylene glycol via the formation of mono- and di-acetate (equations 131 and 132).359-361 The overall yield from ethylene to ethylene glycol is more than 90%, making this reaction competitive with respect to the older silver-catalyzed ethylene epoxidation process. 

Four-membered rings can be synthesised by [2 + 2] cycloadditions. However, thermal [2 + 2] cycloadditions occur only with difficulty they are not concerted but involve diradicals. Photochemical [2 + 2] reactions are common and although some of these may occur by a stepwise mechanism many are concerted. An example of a [2 + 2] reaction is the photodimerisation of cyclopent-2-enone. This compound, as the neat liquid, or in a variety of solvents, on irradiation with light of wavelength greater than 300 nm (the n - n excited state is involved) is converted to a mixture of the head-to-head (48) and head-to-tail (49) dimers, both having the cis,anti,cis stereochemistry as shown. It is believed that the reaction proceeds by attack of an n - n triplet excited species on a ground state molecule of the unsaturated ketone (Section 2.17.5, p. 106). In the reaction described (Expt 7.24) the cyclopent-2-enone is irradiated in methanol and the head-to-tail dimer further reacts with the solvent to form the di-acetal which conveniently crystallises from the reaction medium as the irradiation proceeds the other dimer (the minor product under these conditions) remains in solution. The di-acetal is converted to the diketone by treatment with the two-phase dilute hydrochloric acid-dichloromethane system. 

The cyclohexane-1,2-di acetal group can be introduced by transketal-isation with 1,1,2,2-tetramethoxycyclohexane. The Dispoke and CDA group can be removed by transketalisation with ethylene glycol in the... 

The behaviour in solution of dimethyltin(IV) complexes containing different aminopoly-carboxylic acids were also investigated293,294. The X-ray crystal structure analyses of the tin complexes with IV-methyliminodiacetate (mida), pyridine-2,6-dicarboxylate (pdc) and ethylenediamine-iV.iV -di acetate (edda) revealed dimeric structures for the first two compounds and a monomeric structure for the complex dimethyltin (edda). In contrast, the dimethyltin(IV) complex (137) with ethylcncdiarninc-/V,/V,iV, /V -tetraacetate (edta) and water is a polymer in which each tin atom adopts a distorted pentagonal-bipyramidal configuration with the two methyl groups in axial positions. 

Oxo-4-phenyl-1,3,3-trimethyl-E16b, 274 (Imin 4- Keten-di acetal)... 

SYNS ACETIC ACID, COBALT(2+) SALT, TETRA-HYDRATE COBALT DI ACETATE TETRAHYDRATE COBALTOUS ACETATE TETRAHYDRATE OCTAN KOBALTNATY (CZECH)... 

See Acecotetrazacyclooctane Acetyltetrezanononediol-di acetate, Trinitro. See under Acetyldiacetoxytetrazanonane Acetyltrlozacyclohexane and Derivatives. See Aceto tri a zacy do h ex an e Acetyl trinitroani line. See 2,4,6-Trinitro-acetanilide, under Acetanilide Acetyltrinitrotetrazacyclodctane. See 1-Aceto-3,5,7-trinitto-1,3,5,7-tetrazacyclo-octane, under Acetotetrazacycloo ctane Acetylore(Fr). Acetylide... 

Di-acetic Acid.—By this synthesis, succinic acid must be two molecules of acetic acid joined together by the loss of one hydrogen from each molecule. It is therefore a symmetrical compound consisting of two like residues of acetic acid, (—CH2—COOH), i.e., di-acetic acid. 

Thus, according to these two syntheses succinic acid must be symmetrical di-acetic acid. As succinic acid is isomeric with methyl malonic acid the latter is also called iso-succinic acid. 

Inorganic Syntheses, Volume XVIII Edited by Bodie E. Douglas Copyright 1978 by Jolni Wiley Sons, Inc. Ethylene(iiamine-N,N -Di acetic Acid Complexes ofCobalt(III) 103... 

Acetals, however, are easily regioselectively introduced (Schemes 3.11 and 3.12) [9]. Benzylidene acetals are preferentially formed as six-membered dioxane-type acetals (i.e., hexopyranosides form 4,6-0-benzylidene derivatives), whereas isopropylidene acetals are more stable as five-membered dioxolane acetals formed on vicinal cw-diols. However, the selectivity is not complete and methyl mannoside, for example, produces mixtures of the mono- and di-acetal compounds. The use of methyl propenyl ether yields mainly the kinetic product (the 4,6-0-isopropylidene acetal). Complementary to these traditional acetals is a rather recently developed acetal — the BDA-acetal [21]. In contrast to other acetals, this exclusively forms acetals between... 

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