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Carboximide

Cyanopyridazines add ammonia, primary and secondary amines and hydroxylamine to give amidines or amidoximes. Substituted amides, thioamides and carboximidates can be also prepared. With hydrazine, 3-pyridazinylcarbohydrazide imide is formed and addition of methylmagnesium iodide with subsequent hydrolysis of the imine affords the corresponding pyridazinyl methyl ketone. [Pg.34]

Carboximide, trichloromethylthio-biocidal activity mechanism, 1, 400-401 fungicide, 1, 399 Carboximides... [Pg.576]

The synthesis of key intermediate 6 begins with the asymmetric synthesis of the lactol subunit, intermediate 8 (see Scheme 3). Alkylation of the sodium enolate derived from carboximide 21 with allyl iodide furnishes intermediate 26 as a crystalline solid in 82 % yield and in >99 % diastereomeric purity after recrystallization. Guided by transition state allylic strain conformational control elements5d (see Scheme 4), the action of sodium bis(trimethylsilyl)amide on 21 affords chelated (Z)-enolate 25. Chelation of the type illustrated in 25 prevents rotation about the nitrogen-carbon bond and renders... [Pg.491]

Carboximide 160, the C35-C42 fragment, can be traced retro-synthetically to phosphonate 169 and aldehyde 170. In the synthetic direction, the C35-C36 bond in 160 could be constructed by an intermolecular Horner-Wadsworth-Emmons (HWE)70 coupling of intermediates 169 and 170. Reduction of the unsaturated coupling product and exchange of silyl protecting groups would then furnish compound 160. [Pg.606]

The diastereoselectivity of the zinc iodide catalyzed reaction of the azetidinone I with the trimethylsilyl enolate derivatives of the chiral 3-(l-oxopropyI)oxazolidinones 6 was considerably lower (about 60 40), although independent generation of the zinc enolate, via exchange of the lithium enolate with zinc bromide, afforded the /9-Iactam carboximide derivatives in a ratio (RIS) 80 20177. [Pg.856]

Note The usual method for such conversions is via the carboximidic esters, but it has not been used of late. [Pg.344]

Alkenes can also be epoxidized directly with a variety of organic peroxy acids or related reagents such as peroxy carboximidic acid, RC(NH)OOH, which is readily available through an in situ reaction of... [Pg.52]

Cyano-l,2,4-thiadiazole-5-carboximidate 5-Imino-A3-l,2,4-thiadiazoline 3,5-Bis(diphenylamino)-l,2,4-thiadiazole... [Pg.489]

TABLE 4-19. Diasteroselective Hydroxylation of Chiral Carboximide Sodium Enolates Using 2-(Phenylsulfonyl)-3-Phenyl-Oxaziridine (141) in THF at — 78°C... [Pg.252]

This procedure demonstrates a particularly effective method for controlling the relative and absolute stereochemistry of the aldol reaction. It is quite general in scope. Alkyl-, aryl, and a,6-unsaturated aldehydes all give good results. In addition to chiral propionates, a range of related aldol reactions may be carried out. For example, the analogous aldol reactions of thioalkyl, benzyloxy, or haloacetate, as well as succinate- and crotonate-derived carboximides, have been reported. [Pg.173]

The dc polarography of a large group of pteridines in pH 2.0 phosphate buffer has been reported [85]. Three groups of pteridines (2,4,7-triamino-pteridines, 7-substituted-4-amino-2-aryl-5-pteridine carboxamides, and 4,7-diamino-2-aryl-5-pteridine carboximides) demonstrated polarographic reduction that was found to occur in two steps, to be pH-dependent, and to involve two electrons per step. [Pg.790]

Gregg et at.si) examined photosensitization of perylene pigments (Dye 15-17) on a porous Sn02 thin film instead of Ti02 film as DSC, in view of energy matching with conduction band of semiconductors and LUMO of the sensitizers. When perylene-3,4-dicarboxylic acid-9,10-(5-phenanthroline) carboximide (Dye 15) was used, Jsc of 3.26 mA-cm 2, of 0.45 V, and a photoelectric conversion efficiency of 0.89% were observed under AM 1.5 irradiation. IPCE achieves close to 40% at 460 nm. [Pg.177]

Carbamate, thiocar-bamate, pheny-lureas, triazines, acetanilide, uracil, propionalide, benzonitrile, benzamide, di-carboximide, dinitroaniline, pyrethroid, thiadi-azinone, metoxy-benzoic, phenol, phenoxy acid, coumarin... [Pg.742]


See other pages where Carboximide is mentioned: [Pg.19]    [Pg.1013]    [Pg.134]    [Pg.576]    [Pg.613]    [Pg.620]    [Pg.855]    [Pg.342]    [Pg.19]    [Pg.110]    [Pg.327]    [Pg.265]    [Pg.37]    [Pg.1191]    [Pg.223]    [Pg.141]    [Pg.309]    [Pg.401]    [Pg.579]    [Pg.583]    [Pg.278]    [Pg.576]    [Pg.2369]   
See also in sourсe #XX -- [ Pg.825 ]




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Carboxamides and carboximides

Folpet, Fungitrol 11, Intercide TMP (carboximide)

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