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1 -ethoxycarbonylamino-2-

Instead of the corresponding cyclized product, only the N-(, 2,4-thiadi-azol-3-yl)aminomethylenemalonate (1133) was obtained in 12% yield from the reaction of 3-amino-5-ethoxycarbonylamino-l,2,4-thiadiazole and EMME in polyphosphoric acid at 110°C for 3 hr (77JHC621). [Pg.246]

Several of these oxadiazoloquinoxaline 5-oxides have been converted into quinoxaline 1,4-dioxides. For example, 2-oxo-2//-[l,2,4]oxadiazolo[2,3-a]quinoxa-line-4-carbonitrile 5-oxide (572) in refluxing ethanol or 2-propanol for 2 h gave 3-ethoxycarbonylamino- (573, R = Et) or 3-isopropoxycarbonylamino-2-quinoxa-linecarbonitrile 1,4-dioxide (573, R = Pr ) in 61% or 74% yield, respectively 10 other analogous products with 6- and/or 7-substituents were made unambiguously in a similar way. ... [Pg.78]

Dimethyl-5,8-quinoxalinequinone (145) underwent cycloaddition by 1,4-bis(ethoxycarbonylamino)-1,3-butadiene (144) to give 6,9-bis(ethoxycarbo-... [Pg.210]

Formamido- (100) or 6-ethoxycarbonylamino-2,3-dimethylquinoxaline (102) gave 2,3-dimethyl-6-methylaminoquinoxaline (101) (LiAlH4, THF, <5°C, 4 h 74% or 70%, respectively) 6-formamido-3,8-dimethylquinoxaline likewise gave 2,5-dimethyl-7-methylaminoquinoxaline (70%) and 6-forma-mido-3,7-dimethylquinoxaline gave 2,6-dimethyl-7-methylaminoquinoxaline (82%). °... [Pg.275]

Dimethyl-6-quinoxalinamine (127, R = H) gave 6-ethoxycarbonylamino-2,3-dimethylquinoxaline (127, R = C02Et) (ClC02Et, pyridine, THE, 20°C,... [Pg.280]

Carboxyethyl)-6,7-dimethoxy-1 -methyl-2(l//)-quinoxalinone (50) gave successively 3-[2-(aziodformyl)ethyl]- (51) [(PhO)2PON3, EtsN, Me2NCHO, no details crude], 3-(2-isocyanatoethyl)- (53) [PhH, reflux, 1 h unisolated (Curtius fl)], and 3- 2-[A -(ethoxycarbonylamino)ureido]ethyl -6,7-dimethoxy-l-methyl-2(l//)-quinoxalinone (52) (H2NNHC02Et, PhH, reflux, 30 min ... [Pg.326]

Methyl 3-ethoxycarbonylamino-6.7-dmiethyl-2-quinoxalinecarboxylate (72, R = OMe) gave 3-ethoxycarbonylammo-6,7-dimethyl-2-quinoxalinecarboxamide (72, R = NH2) (MeOH, NHji, 24°C until no tic spot for substrate 65%). ... [Pg.330]

Bis(ethoxycarbonylamino)-l, 2,4-thiadiazole 4-Methyl-3-trichloromethyl-l,2,4-thiadiazolin-5-thione 4-Methyl-3-(/i-toluenesulfonyl)-l,2,4-thiadiazolin-5-thione 4-Methyl-3-ethoxycarbonyl-l,2,4-thiadiazolin-5-thione... [Pg.490]

Other novel diazo compounds that have been subjected to 1,3-dipolar cycloaddition with activated alkenes, and that give unusually functionalized pyrazolines (Scheme 8.7), include l-diazo-3-trimethylsilylpropan-2-one (20) (49), 2-diazo-methyl-4(57/)-furanones (21) (50), methyl 2-diazo-5-methylanilino-5-oxopentano-ate (22) (51), 2-(acylamino)-2-diazoacetates (23) (51), ethyl 2-diazo-4,4,4-trichloro-3-(ethoxycarbonylamino)butyrate (24) (52), and diazopropyne (53). [Pg.546]

The ethoxycarbonylamino-l,2,4-carboxylates 129 react with aqueous ammonia to give a selection of 2-aryl pyrimido[4,5- ]-l,2,4-triazine triones 130 as shown in Equation (19) <2006ARK68>. [Pg.1295]

See other pages where 1 -ethoxycarbonylamino-2- is mentioned: [Pg.19]    [Pg.256]    [Pg.130]    [Pg.19]    [Pg.366]    [Pg.289]    [Pg.857]    [Pg.19]    [Pg.304]    [Pg.1145]    [Pg.24]    [Pg.19]    [Pg.19]    [Pg.549]    [Pg.272]    [Pg.419]    [Pg.361]    [Pg.224]    [Pg.224]    [Pg.226]    [Pg.62]    [Pg.295]    [Pg.1936]    [Pg.2303]    [Pg.2303]    [Pg.2303]    [Pg.2303]    [Pg.295]    [Pg.326]    [Pg.76]    [Pg.310]    [Pg.254]    [Pg.255]    [Pg.256]    [Pg.625]   
See also in sourсe #XX -- [ Pg.159 ]



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2-Ethoxycarbonylamino-5 -phenyl

Ethoxycarbonylamino acids

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