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2-Amino-3-methyl-2-butene

Due to the abundance of epoxides, they are ideal precursors for the preparation of P-amino alcohols. In one case, ring-opening of 2-methyl-oxirane (18) with methylamine resulted in l-methylamino-propan-2-ol (19), which was transformed to 1,2-dimethyl-aziridine (20) in 30-35% yield using the Wenker protocol. Interestingly, l-amino-3-buten-2-ol sulfate ester (23) was prepared from l-amino-3-buten-2-ol (22, a product of ammonia ring-opening of vinyl epoxide 21) and chlorosulfonic acid. Treatment of sulfate ester 23 with NaOH then led to aziridine 24. ... [Pg.65]

Zeatin. trans-Z. [( )-2-methyl-4-(9//-purin-6-yl-amino)-2-buten-l-ol, CioHuNjO, Mr 219.25, mp. 212-213 °C (207-208°)], like kinetin, is a cytoki-nin and was originally isolated from corn ears (Zea mays) as well as from many other plants. In higher plants, trans-Z. acts as a promoter of cell division and, together with plant growth substances, has a regulating effect on various processes of plant growth. It is the most effective, naturally occurring cytokinin and at least 50-fold more active than the cw-form. [Pg.712]

Scheme 10.7. A thermally induced allylic N O migration of the butenyl group of N-methyl-A-phenyl-3-amino-l-butene oxide. See Moriwaki, M. Yamamoto, Y. Oda, J. Inouye, Y. / Org. Ghent., 1976,41,300. Scheme 10.7. A thermally induced allylic N O migration of the butenyl group of N-methyl-A-phenyl-3-amino-l-butene oxide. See Moriwaki, M. Yamamoto, Y. Oda, J. Inouye, Y. / Org. Ghent., 1976,41,300.
An equimolar mixture of 2-mercapto-3-pentanone and 1-amino-l-buten-3-one stirred whereupon after ca. 10 min. tbe temp, rises to 50-60°, tbe product isolated when tbe exothermic reaction has ceased and the mixture regained room temp. 5-methyl-4-ethyl-2-acetonyl-Zl -thiazoline (Y 78%) heated to 180° with distillation of the products 5-methyl-4-ethylthiazole (Y 92%). F. e. s. F. Asinger, L. Schroder, and S. Hoffmann, A. 64S, S3 (1961). [Pg.155]

Acetamido-4-amino-6-chloro-s-triazine, see Atrazine Acetanilide, see Aniline, Chlorobenzene, Vinclozolin Acetic acid, see Acenaphthene, Acetaldehyde, Acetic anhydride. Acetone, Acetonitrile, Acrolein, Acrylonitrile, Aldicarb. Amyl acetate, sec-Amyl acetate, Bis(2-ethylhexyl) phthalate. Butyl acetate, sec-Butyl acetate, ferf-Butyl acetate, 2-Chlorophenol, Diazinon. 2,4-Dimethylphenol, 2,4-Dinitrophenol, 2,4-Dinitrotoluene, 1,4-Dioxane, 1,2-Diphenylhydrazine, Esfenvalerate. Ethyl acetate, Flucvthrinate. Formic acid, sec-Hexyl acetate. Isopropyl acetate, Isoamyl acetate. Isobutyl acetate, Methanol. Methyl acetate. 2-Methvl-2-butene. Methyl ferf-butvl ether. Methyl cellosolve acetate. 2-Methvlphenol. Methomvl. 4-Nitrophenol, Pentachlorophenol, Phenol. Propyl acetate. 1,1,1-Trichloroethane, Vinyl acetate. Vinyl chloride Acetoacetic acid, see Mevinphos Acetone, see Acrolein. Acrylonitrile. Atrazine. Butane. [Pg.1518]

Heistcllung und Anwendung von N,N -Bis-[mcthoxycarhonyl]-sulfurdiimid sind fur das Beispicl von dessen Reaktion mit 2-Methyl-2-buten zu N-(2-Methyl-2-butenyl)-carbamidsaure-methylester (43-52%, bezogen auf die Vorstufe des Diimids) ausfiihrlich beschrieben1 Hydrolyse des Esters ergibt dann J-Amino-2-methyl-2-buten. [Pg.652]

Neuere Beispiele fur die Anwendung der Gabriel-Synthese in ihrer urspriinglichen Form sind u.a. die Herstellung von 4-Chlor-l-phthalimido-2-buten aus l,4-Dichlor-2-buten (65%)1 sowie die erste Stufe der folgenden Synthese von zwei allenischen Amino-alko-holen, 5-Amino-4-ethyl-l-hydroxy-2-methyl-2,3-hexadien (I R =H, R2=R3 = CH3 ... [Pg.697]

Bei einer Variante dieser Reaktion erhalt man N-geschiitzte primare Allylamine, indem man das l-Phenylseleno-2-alken in Methanol mit Chloramin-T oder mit Carbamid-saure-benzylester/N-Chlor-succinimid/Triethylamin umsetzt2,4, wie hier fur die Herstel-lung von 3-Methyl-3-(4-methyl-henzolsulfonylamino)-l-buten (88%) und (2R,3E)-4-(Be-nzyloxycarbonyl-amino)-2-penten (56%) formuliert. [Pg.753]

Auf analoge Weise erhalt man aus z. B. 6-Acetoxy-l, 8-menthadien 6-Amino-1,8-menthadien (6-Amino-4-isopropenyl-l-methyl-cyclohexen 6-Amino-limonen) in 84%iger Ausbeute1. Bei einer Variante der letzteren Reaktion wird ein Phosphorsaure-(4-acetoxy-2-butenyl-ester) zunachst mit 2-Methyl-piperidin umgesetzt und dann in der obigen Weise weiter verfahren man erhalt auf diese Weise 4-Amino-I-(2-methyl-piperidino)-2-buten in 84% Ausbeute1 ... [Pg.959]

The [2,3]-sigmatropic rearrangement of (E)-(218a), a derivative of the chiral cyclic a-amino acid (S)-proline, produced the aminonitrile (219) in a stereoselective manner. Saponification of (219) yielded (+)-2-methyl-2-phenyl-3-butenal (220) with an enantiomeric excess of 90%219>. In replacing the benzyloxymethyl moiety in (218a) by a methyl group, the optical purity of the chiral aldehyde (220) obtained in the corresponding reaction sequence decreases considerably 219). [Pg.224]

Butene 2-(Allyl-methyl-amino)-3-fluoro- E10b2. 228 (N = C -CII2 - NH — C = CH)... [Pg.655]

S)-l is obtained from the bis(methyl carbonate) of (Z)-2-butene-l,4-diol and l,2-bis(tosyl-amino)ethane through a tandem pa]ladium(0)-catalyzed allylic substitution in the presence of (R)-BINAP (I) as chiral ligand79. Equilibration of the 7t-allylpalladium intermediates formed before the intramolecular nucleophilic attack is necessary for high enantioselectivity. Thus, only a racemic piperazine is produced in the reaction of the more nucleophilic l,2-bis(benzyl-amino)ethane with the diacetate of (Z)- or ( )-2-butene-l,4-diol. [Pg.1170]

C8H8CIN02 methyl 4-amino-3-chlorobenzoate 84228-44-4 25.00 1 2860 2 13410 C8H80S trans-4-(2-thienyl)-3-buten-2-one 33603-63-3 25.00 1.1510 1... [Pg.237]

The N-metallated azomethine ylides having a wider synthetic potential are N-lithiated ylides 141, derived from the imines of a-amino esters, lithium bromide, and triethylamine, and 144 from the imines of a-aminonitriles and LDA (Section II,G). Ester-stabilized ylides 144 undergo regio- and endo-selective cycloadditions, at room temperature, to a wide variety of unsym-metrically substituted olefins bearing a carbonyl-activating substituent, such as methyl acrylate, crotonate, cinnamate, methacrylate, 3-buten-2-one, ( )-3-penten-2-one, ( )-4-phenyl-3-buten-2-one, and ( )-l-(p-tolyl)-3-phenyl-propenone, to give excellent yields of cycloadducts 142 (88JOC1384). [Pg.331]

Mit En-aminen fiihrt die Reaktion nur dann zu lH-Pyrazolen, wenn der Amino-Rest eliminiert wird. Aus 2-Morpholino-2-buten entsteht mit Diazo-essigsaure-ethylester bei 20° in Diethylether 3(5)-Ethoxycarbonyl-4-ethyl-5(3)-methyl-1 H-pyrazol [45% Schmp. 79-800]880. [Pg.509]

The reaction of 2-amino-4-methyl-l,l,l-trifluoromethyl-2-butene-4-one with thiosemicarbazide forms 5-hydroxy-5-trifluoromethyl-2-pyrazoline, and with derivatives 3-amine-1,2,4-triazoles forms derivatives triazolo[l,5-a]pyrimidine (02IZV332) (Scheme 75). [Pg.311]

Amino-l-aryl-4,4,4-trifluoro-2-buten-l-ones react with 2-aminoethanol at room temperature in the absence of solvent over 2-3 days to give only aminoenones in 46-75% yield (98MC83) (Scheme 82). It is surprising that the thiophene analogue of aminoenones (3-amino-l(2-thienyl)-4,4,4-trifluoro-2-buten-l-one) reacts with 2-aminoethanol to form 2(2-thenoyl-methyl)-2-trifluoromethyloxazolidine. [Pg.314]

The product was previously identified in beer by Andrews (1987) and in human sweat by Polak et al. (1988), and characterized as sunstruck or lightstruck off-flavor. The cause has been attributed to the degradation of bitter isohumulones from hops under the influence of ultraviolet light (Bondeel et al., 1987). By photofragmentation trans-isohumulone liberates a prenyl radical which can trap a thiol radical, producing an undesired flavor for beer. Holscher et al. (1992) have also shown that 3-methyl-2-buten-l-thiol and 3-mercapto-3-methylbutanol are principally formed under pyrolytic conditions in roast model reactions of prenyl alcohol and sulfur-containing amino acids. [Pg.337]


See other pages where 2-Amino-3-methyl-2-butene is mentioned: [Pg.986]    [Pg.231]    [Pg.3]    [Pg.188]    [Pg.149]    [Pg.1043]    [Pg.601]    [Pg.173]    [Pg.669]    [Pg.701]    [Pg.959]    [Pg.1192]    [Pg.205]    [Pg.653]    [Pg.877]    [Pg.571]    [Pg.365]    [Pg.245]    [Pg.303]    [Pg.303]    [Pg.311]    [Pg.358]    [Pg.230]    [Pg.425]    [Pg.76]    [Pg.470]    [Pg.303]    [Pg.303]    [Pg.107]    [Pg.325]    [Pg.335]   
See also in sourсe #XX -- [ Pg.200 ]




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2-Methyl-2-butenal

2-Methyl-2-butene

3-Methyl-2-buten

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