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Ethyl idene

Proper deuterium-labeling experiments involving (CD3)4Sn and [1,1,1,-10,10,10-D6]-2,8-decadiene confirmed that propylene is indeed the first-formed olefin, and its structure indicated that the methylidene and ethyl-idene moieties originated from Me4Sn and 2,8-decadiene, respectively. [Pg.454]

In the second procedure13 (see Scheme 3), D-glucitol (10) was converted into 5-O-benzoyl-1,3 2,4-di-O-ethyl idene-6-O-trityl-D-glucitol (17) by successive treatment with acetaldehyde to produce 15, with chlorotriphenylmethane to provide 16, and with benzoyl chloride to afford 17. Selective removal of the trityl protecting group from 17, to give 18, followed by oxidation of 18, provided 19 which, on hydrolysis, afforded L-gulose (9). [Pg.291]

Ethyl idene Benxoacetate. See Ethylidene Acetobonzoate in this Vol... [Pg.176]

Important evidence in support of the chain-reaction theory was the synthesis of carbene complexes, such as diphenylcarbenepentacarbonyl-tungsten(O) (4), and their reaction with olefins. The results in Eq. (12.16) demonstrate69 the scission of the carbon-carbon double bond of the alkene and the combination of the ethyl-idene fragment with the diphenylcarbene group of 4 ... [Pg.702]

Scheme 5.22 Typical nitrile-assisted synthesis of the 8-lactone 2-ethyl idene-6-hepten-5-olide. Scheme 5.22 Typical nitrile-assisted synthesis of the 8-lactone 2-ethyl idene-6-hepten-5-olide.
The ESR spectra of the anion radicals 246 derived from a series of 4-dicyanom ethyl idene-4//-thiopy ran sulfones show clearly resolved hyperfine structure centred around g values of ca. 2000. Large nitrogen splitting of 1.0-1.5 mT and FI-3 and FI-5 splitting of 0.3-0.93 mT are observed <1995JOC1674>. [Pg.792]

Anthranilsaure N-(2-Nitro-ethyl-iden)- E7a, 318 (H3C-N02/ NaOH + 2-NH2 — Ar — COOH) Benzofurazan-l-oxid 5-Ethoxycarbo-nyl- E8c, 782 (3-N3-4-N02-Ar-COOR/H )... [Pg.592]

Methyl-1 -(2-oxo-2-phenyl-ethyl-iden)-2,5-dihydro- El4b, 215 ( —H )... [Pg.1145]

Dutch Uinsetzung von (2-Alkinyl)-isothiocyanalen mil Aminen werden 2-Amino-5-(2-amino-ethyl-iden)-4,5-dihydro-l, 3-thiazole erhalten708 z.B. ... [Pg.129]

The presence of only 4 deuteriums in poriferasterol (4-B) formed from [C HjJmethionine in Ochromonas implies the formation of an intermediate ethyl-idene compound. Feeding experiments showed that the 28-Z isomers ethylidene lophenol (5-C) and isofucosterol (4-C) are both effectively incorporated into... [Pg.179]

One reaction model that explains these results has been proposed [165]. The hydrogen atom is transferred to the ethylene molecule that is weakly adsorbed on top of the ethylidyne and in the second layer perhaps by forming an ethyl idene intermediate. This model of hydrogen transfer from hydrocarbons to ethylene was first proposed by Thomson and Webb [175]. This mechanism is of the Eley-Rideal type and is characterized by low activation energy and structure insensitivity. [Pg.509]

Syntheses of some pentonohydroxamic acid derivatives are covered in Chapter 10. Alkaline degradation of 5-O-a-D-glucopyranosyl-D-fructopyranose (leucrose) has afforded two novel saccharinic acids, 2-C-(2-hydroxyethyl)eiy-thronic acid and 2-C-(2-hydroxyethyl)threonic acid. Treatment of 4,6-O-ethyl-idene-D-glucose with the sulfur ylid JNr,iST-diethyl trimethylsulfonium-acetamide gave the epoxyaldonamide 6 as well as stereoisomers. ... [Pg.204]

In 2003, Wang reported an efficient, enantiospecific total synthesis of (+)-vellosimine (161) with the first stereospecific establishment of the ethyl-idene double bond by a key palladium (enolate-mediated) carbon—carbon bond-forming process (Scheme 3). This key reaction provided a very efficient approach for a direct entry into the basic pentacycHc skeleton of the... [Pg.139]

Epoxy, bisphenol A Epoxy, bisphenol F Epoxy resin Ethylene/propylene/dicyclopentadiene terpolymer Ethylene-propylene-ethyl idene norbomene Glycidyl neodecanoate PEG-4 dimethacrylate 3-(n-Pentadecyl) phenol Saccharin sodium anhydrous Saccharin sodium dihydrate Sodium-4-chlorophthalate resin modifier, adhesive coating elastomer Glyceryl hydrogenated rosinate resin modifier, adhesive coating film-formers Glyceryl hydrogenated rosinate resin modifier, adhesives... [Pg.5616]

In related work the derivative (13) of 3-deoxy-L-gulo-oct-2-ulosonlc acid was synthesized from 5,6-anhydro-l,3 2,4-di-0 -ethyl-idene-D-glucitol and the anion of ethyl 1,3-dithlane-2-carboxylate. [Pg.159]

Lactic Acid ( -Hydroxyprcrpionic add, ethyl-idene-lactic acid)... [Pg.493]

See other pages where Ethyl idene is mentioned: [Pg.21]    [Pg.421]    [Pg.164]    [Pg.210]    [Pg.176]    [Pg.26]    [Pg.386]    [Pg.631]    [Pg.490]    [Pg.174]    [Pg.416]    [Pg.325]    [Pg.59]    [Pg.3298]    [Pg.233]    [Pg.468]    [Pg.175]    [Pg.369]    [Pg.361]    [Pg.119]    [Pg.278]    [Pg.303]    [Pg.21]    [Pg.1789]    [Pg.209]    [Pg.5577]    [Pg.5577]    [Pg.496]    [Pg.496]    [Pg.296]   


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