Zinc acetate diethyl

Tetraphenylporphin (H2TPP) was prepared from pyrrole and benzaldehyde (25). The tetraphenylchlorin contamination was oxidized by use of 2,3-dichloro-5,6-dicyano-p-benzoquinone (26). Octaethylporphin (H2-OEP)was prepared by the method of Paine et al.(27) from 3,4-diethyl-2-ethoxy-carbony1-5-methyl-pyrrole (28). Zinc(II)-tetraphenylporphin (ZnTPP) was prepared by refluxing H2TPP and zinc acetate in dimethyl-formamide (29). ZnTPP was dissolved at a concentration of 10 -10 ... 

Trichlorotrifluoroethane and zinc in diethyl ether or dimethylfor-mamide (DMF) form an organometallic complex with diethyl ether [773] or dimethylformamide [114. This complex reacts with aldehydes similarly as the Grignard reagents to form primarily the expected alcohols. In the presence of acetic anhydride, the alcohol is converted to the corresponding olefin, predominantly with Z configuration. In the case of benzaldehyde, Z- and E- 2-chloro-l-phenyl-3,3,3-trifluoropropene are the products H and I [114]. 

DIETHYL OXALATE (95-92-1) Combustible liquid (flash point 168°F/76°C). Water slowly forms oxalic acid. Incompatible with zinc acetate. Violent reaction with strong oxidizers. 

Dicaprylyl ether. See Dioctyl ether Dicaprylyl maleate (INCI). See Dioctyl maleate Dicaprylyl peroxide. See Dioctanoyl peroxide Dicaptol. See 2,3-Dimercapto-1-propanol Dicarbamoylhydrazine. See Biurea S-(1,2-Dicarbethoxyethyl)-0,0-dimethyldithiophosphate. See Malathion Dicarbethoxymethane. See Diethyl malonate P,P-Dicarbomethoxydiethyl sulfide. See Dimethyl thiodipropionate Dicarbomethoxy zinc. See Zinc acetate Dicarbonic acid, diethyl ester. See Diethyl... 

Reduction of the enones (44) and (45) by zinc in diethyl ether-anhydrous HCl-acetic anhydride leads to the cyclopropanols (46) (as acetates) which on hydrolysis give, respectively, the corresponding 2-arylcyclohexanones and 2-benzylcyclopentan-... 

The zinc and cadmium organosilyl compounds are about equally unstable, in sharp contrast to the mercury compounds. The reaction of lithium tetrakis(trimethylsilyl) aluminate with zinc acetate in diethyl ether yields (25 %) bis(trimethylsilyl) zinc [435]. This compound can be kept for about three weeks under an inert gas at — 20 °C. The reaction of lithium tetrakis(trimethylsilyl) aluminate with cadmium acetate forms bis(trimethylsilyl) cadmium [435] (27%, very unstable, sensitive to light). Bis(tri-t-butylsilyl) cadmium [436] (m. p. 140 °C, slightly yellowish crystals which turn greenish black on exposure to air) can be obtained from tri-r-butylsilane and diethylcadmium (Eq. 3.230) ... 

The use of metallorganic precursors also allows for a clean route to metal oxide nanoparticles. By employing diethyl zinc as a starting material, Williams and coworkers have shown that ZnO epoxy-resin nanocomposites and ZnO-coated carbon nanotubes may be prepared. The benefit of this method is the lack of undesirable by-products here, only ethane is produced. Given the pyrophoric nature of diethyl zinc, this reaction should be carried out under inert conditions. Ionic liquids too have been used in the low temperature synthesis of ZnO nanoparticles. Li et al. have employed 1-butyl-3-methylimidazolium chloride, in conjunction with zinc acetate and sodium hydroxide, to prepare hexagonal wurtzite ZnO nanoparticles which were formed upon simple grinding at room temperature for under an hour. ... 

T o 2rf] With phthalaldehydic acid, pyrrole gives 3-(2-pyrryl)phthalide. 2,5-Dimethylpyrrole reacts similarly385 at C(3). With acetonylacetone and zinc acetate in acetic acid, 3,4-diethylpyrrole gives l,2-diethyl-5,8-dimethyl-... 

Snyder and Smith prepared diethyl acetamidomalonate in 40% yield by reduction of diethyl isonitrosomalonate in ethanol over palladium on charcoal followed by direct acetylation of diethyl aminomalonate in the filtrate with acetic anhydride. Ghosh and Dutta used zinc dust instead of palladium. A modification using Raney nickel is described by Akabori et al. Shaw and Nolan reported a 98% yield by conversion of diethyl oximino-malonate-sodium acetate complex. 

In 1897, Reissert reported the synthesis of a variety of substituted indoles from o-nitrotoluene derivatives. Condensation of o-nitrotoluene (5) with diethyl oxalate (2) in the presense of sodium ethoxide afforded ethyl o-nitrophenylpyruvate (6). After hydrolysis of the ester, the free acid, o-nitrophenylpyruvic acid (7), was reduced with zinc in acetic acid to the intermediate, o-aminophenylpyruvic acid (8), which underwent cyclization with loss of water under the conditions of reduction to furnish the indole-2-carboxylic acid (9). When the indole-2-carboxylic acid (9) was heated above its melting point, carbon dioxide was evolved with concomitant formation of the indole (10). 

Diaminobiuret has been prepared only from N-tricarboxylic ester and hydrazine hydrate.1 Ethyl hydrazinecarboxylate has been prepared by reduction of nitrourethan electrolytically2 or with zinc dust and acetic acid,3 and by the action of hydrazine hydrate on diethyl carbonate,4 6 ethyl chlorocarbonate,6 and N-tricarboxylic ester.1... 

Diethyl ethylidenemalonate has been prepared by heating acetaldehyde, diethyl malonate, and acetic anhydride 2 3 by heating the same reagents plus zinc chloride 4 by treating acetaldehyde and diethyl malonate with sodium ethoxide or piperidine 6 and by heating diethyl malonate, ethylidene bromide, and ethanolic sodium ethoxide.6... 

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