3-Diazo-4-methyl-5-phenyl

Diazo-4-methyl-5-phenyl-3H-pyrazol5 88% Schmp. 99° (Zets.)... [Pg.1239]

Methyl-5-phenyI- -diazonium-chlorid E14b, 1308 (aus Amin) 3H-Pyrazol 3-Diazo-4-methyl-5-phenyl- EJ4b, 1309/1311 (aus Amin)... [Pg.709]

Phosphinsaure (Diazo-methyl)-phenyl- -methylester E14b, 1329 (NH - N2)... [Pg.484]

The occurrence of arenediazo alkyl and aryl ethers as intermediates has been discussed since 1870, when Kekule and Hidegh postulated that in the azo coupling reaction of benzenediazonium salts with phenol, 4-phenylazophenol is formed via the diazo phenyl ether. The analogous problem for diazo methyl ethers was first discussed by von Euler (1903). [Pg.313]

The ratio of isomeric ethers is strongly affected by polar substituents which induce an asymmetric distribution of charge in allylic cations. Photolysis of methyl 2-diazo-4-phenyl-3-butenoate (20) in methanol produced 24 in large excess over 25 as the positive charge of 22 resides mainly a to phenyl (Scheme 8).19 As would be expected, proton transfer to the electron-poor carbene 21 proceeds reluctantly intramolecular addition with formation of the cyclopropene... [Pg.5]

The cycloaddition reactions of the unsymmetrical a-diazo-/3-diketone, 2-diazo-l-phenyl-l,3-butanedione 330, with diaryl imines 331 took place with high regioselectivity, affording exclusively the 6-methyl-5-phenyl-substituted 477-l,3-oxazin-4-ones 332 via the acetylphenylketene, generated by the thermal Wolff rearrangement of 330 (Equation 32) <2002HAC165>. [Pg.417]

Di azoethyl benzene of Methyl phenyl-di azomethane [called (a-Diazo-athyl)-benzol or Methyl-phenyl-diazomethan in Ger], CsH5.C(N2).CH.3 mw 132.16, N 21.20% ... [Pg.57]

Ethanoate Ethyl Diazo-(3-trifluoro-methyl-phenyl)- E14b/2, 1147 (Hydrazon-Ox.)... [Pg.682]

Diazoniobenzenesulfonamido)thiazole tetrafluoroborate, 3113 l-(4-Diazoniophenyl)-l,2-dihydropyridine-2-iminosulfinate, 3386 l(2 -Diazoniophenyl)2-methyl-4,6-diphenylpyridinium diperchlorate, 3841 1(2 -, 3 -, or4 -Diazoniophenyl)-2,4,6-triphenylpyridinium diperchlorate, 3864a 3-Diazoniopyrazolide-4-carboxamide, 1418 5-Diazoniotetrazolide, 0545 3-Diazo-5-phenyl-3//-pyrazole, 3112... [Pg.2074]

Umwandlung von (1-Oxo-alkyl)- in (2-Oxo-alkyl)-, (2-Alkoxy-vinyl)-671, (1-Diazo-alkyl)-672 bzw. (1,1-Bis-[4-hydroxy-phenyl]-alkyl)-phosphinsaure-ester673 (4) Umwandlung von (1-Amino-methyl)- in (l-Diazo-methyl)-phosphinsaure-ester672... [Pg.220]

Diazo-ethoxycarbonyl-mcthyl)-diphenyl- E2, 220 f l-Diazo-2-(2-furyl)-2-oxo-ethy[]-diphenyl- El, 592 (Diazo-methyl)-diphenyl- El, 586f, E2, 145, 220 (l-Diazo-2-oxo-2-phenyl-ethyl)-diphenyl- El, 593... [Pg.1010]

Methan Diazo-[3(bzw. 4)-trifluor-methyl-phenyl]- E14b, 1021 (Sulfonylhydrazon/NaO—R A)... [Pg.445]

Silber Diazo-(methoxy-phenyl-phosphonyl)-methyl- E19d, 629 (H - Ag)... [Pg.467]

Methyl-phenyl- VIII, 175 (CH3 -> CN) E4, 989 (Br-CN+ Amin) 7,8-Diazo-tricy clo [5.3.0.02 -4)deca-l10,5,8-trien E19b, 373 (Ringspal-... [Pg.470]

Thiadiazol 5-(Diazo-methyl)-4-phenyl- E14b, 995 (Oxim + H2N-C1)... [Pg.575]

Ethan 2-Diazo-2-(4-methyl-phenyl)-1,1.1-trifluor- E14b, 1015 (Sulfonylhydrazon-Pyrolyse)... [Pg.580]

Quecksilber (Diazo-methoxycarbo-nyl-methyl)-phenyl- E14b, 1261/ E19d, 623 (H - HgR)... [Pg.588]

Oxiran trcms-3-( Diazo-acetyl)-2-phenyl- E14b, 1194 (Oxiran-Bild.) Propansaure 2-Hydroximino-3-(4-methyl-phenyl)-3-oxo- -nitril X/4, 159... [Pg.708]

E16c. 969 (Pyrazolidin/hv) Essigsaure Diazo-(4-methyl-phenyl)- -ethylester E14b, 1146 (Hydrazon + Base) 6H- ... [Pg.876]

Diazo-(4-methyl-phenyl)-methan- -diethylester E14b, 1334 (aus Hydrazon)... [Pg.1046]

Photolysis of l,2-bis 2-[diazo(phenyl)methyl]phenyl ethane in a benzene solution containing acrylonitrile gave 2-[2-(2,3-dihydro-l-phenyl-1 //-inden-2-yl)phenyl]-2-phenylcyclopropaneni-trile (6,10%), l,2-bis[2-(2-cyano-l-phenylcyclopropyl)phenyl]ethane(7,18%), 11,14-diphenyl-... [Pg.372]

Reactive sulfonium ylides of structure 4 can be synthesized by catalytic decomposition of a-diazocarbonyl compounds in the presence of a sulfide. A combination of this transformation and the reaction sequence described in the preceding scheme is realized in the one-pot synthesis of triacylcyclopropanes 8 by copper-catalyzed decomposition of a-diazo ketones in the presence of methyl phenyl sulfide. ... [Pg.423]

For the related cyclopropanation of diacylethenes by catalytic decomposition of an a-diazo ketone in the presence of methyl phenyl sulfide, see Section 1.2.1.2.4.2.6.3.3. [Pg.424]

Methyl phenyl sulfide (2 mL) and anhyd CUSO4 (50 mg) were added to a solution of l-diazo-3,3-dimethyl-butan-2-one (252 mg, 2 mmol) and ( )-l,2-dibenzoylethene (748 mg, 3 mmol) in anhyd benzene (3 mL), and the mixture was heated at 70 C for 2 h, until the evolution of Nj had ceased. The mixture was cooled, the catalyst was filtered off, and the solvent evaporated in vacuo. Fractional crystallization of the remaining semicrystalline residue from benzene afforded 542 mg (81 %) of an isomeric mixture of the cw-1,2-dibenzoyl (82%) and the rrani-1,2-dibenzoyl (18%) product, additionally 325 mg of tra/75-l,2-dibenzoylethene was recovered. [Pg.475]

Die Cyclisierung von 2-Diazo-4-phenyl-3-pentensaure-ethylester ist mit einer van Alphen-Hiittel-Umlagerung des Phenyl-Restes zum N-Atom verbunden es wird 3-Ethoxycarbonyl-5-methyl-1-phenyl-1 H-pyrazol [87% Sdp. 73°/0,03Torr (3,99 Pa)] gebildet1383. [Pg.492]

Pyrazoles are formed when the diazo compounds react with alkynes or with functionalized alkenes, viz. the enols of /3-diketones. Pyrazolenines (353 Section 4.04.2.2.1) are isolated from disubstituted diazomethanes. Many pyrazoles, difficult to obtain by other methods, have been prepared by this procedure, for example 3-cyanopyrazole (616) is obtained from cyanoacetylene and diazomethane (7iJCS(C)2i47), 3,4,5-tris(trifiuoromethyl)pyrazole (617) from trifluorodiazoethane and hexafluoro-2-butyne (8lAHC(28)l), and 4-phenyl-3-triflylpyrazole (618 R =H) from phenyltriflylacetylene and diazomethane (82MI40402). An excess of diazomethane causes iV-methylation of the pyrazole (618 R = H) and the two isomers (618 R = Me) and (619) are formed in a ratio of 1 1. [Pg.282]

Indazole, 5,5-dimethyl-3-trifluoromethyl-4,5-dihydro-trichomonacidal activity, 5, 291 Indazole, 2-ethoxycarbonyl-reactions, 5, 269 Indazole, 3-fluoro-synthesis, S, 263 Indazole, 1-germyl-synthesis, 5, 236 Indazole, 1-glycosyl-synthesis, 5, 289 Indazole, 2-glycosyl-synthesis, 5, 289 Indazole, halo-reactions, S, 266 Indazole, 2-hydroxy-methylation, 5, 269 Indazole, 3-hydroxy-reactions, S, 264 Indazole, 6-hydroxy-diazo coupling, 5, 86 Indazole, hydroxyphenyl-synthesis, S, 288 Indazole, 3-iodo-synthesis, S, 241 Indazole, l-isopropyl-3-phenyl-reduction, 5, 243 Indazole, 3-mercapto-1 -substituted tautomerism, 5, 265 Indazole, methoxy-... [Pg.664]

Indolizine, hydroxy-conformations, 4, 451 GLC retention times, 4, 451 synthesis, 4, 121 tautomerism, 4, 198, 452 Indolizine, 2-hydroxy-synthesis, 4, 463 Indolizine, 8-hydroxy-conformation, 4, 452 Indolizine, 2-hydroxymethyl-synthesis, 4, 461 Indolizine, 3-hydroxymethyl-synthesis, 4, 461 Indolizine, 6-hydroxymethyl-synthesis, 4, 461 Indolizine, methyl-mass spectra, 4, 187, 450 NM 4, 448 Indolizine, 2-methyl-diazo coupling, 4, 454 mass spectra, 2, 529, 4, 450 nitration, 4, 50, 454 nitrosation, 4, 454 reaction with diaryl disulfide, 4, 460 reaction with nitroethane, 4, 460 Indolizine, 3-methyl-basicity, 4, 454 Indolizine, 5-methyl-acidity, 4, 461 synthesis, 4, 466 Indolizine, 6-methyl-mass spectra, 4, 450 Indolizine, l-methyl-2-phenyl-nitration, 4, 454 nitrosation, 4, 454, 455 Indolizine, 3-methyl-2-phenyl-reaction... [Pg.673]

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