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1.
The occurrence of the retro-Prince reaction in the transformations of an equilibrium mixture of 2-methyl-3-buten-2-ol and 3-methyl-2-buten-1-ol in 24.9–49 % aqueous sulfuric acid at 25 °C has been experimentally proved.Translated fromIzvestiya Akademii Nauk. Seriya Khimicheskaya, No. 2, pp. 332–334, February, 1994.The work was carried out with the financial support of the Russian Foundation for Basic Research (Grant No. 93-03-18356). 相似文献
2.
The kinetic relationships of the hydration of an equilibrium mixture of 3-methyl-1-buten-3-ol (dimethylvinylcarbinol, DMVC) and 3-methyl-2-buten-1-ol (dimethylallyl alcohol, DMAA) with isoprene (C5H8) were investigated in aqueous solutions of sulfuric acid from 24.9 to 49.7% at 25°C. Data were obtained on the mechanism of hydration of the equilibrium mixture of DMVC and DMAA with isoprene.Deceased.N. N. Semenov Institute of Chemical Physics, Russian Academy of Sciences, 117977 Moscow. Translated fromIzvestiya Akademii Nauk, Seriya Khimicheskaya, No. 6, pp. 1311–1314, June, 1992. 相似文献
3.
U. G. Ibatullin T. F. Petrushina Z. M. Nurtdinova Yu. N. Popov M. G. Safarov 《Chemistry of Heterocyclic Compounds》1986,22(7):700-702
The reaction of 3-methyl-3-buten-1-ol with acetophenone and benzalacetone affords a mixture of isomeric 2-methyl-2-aryldi- and tetrahydropyrans, the composition of which was ascertatined by chromatography-mass spectromety.Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 7, pp. 883–885, July, 1986. 相似文献
4.
The gas-phase reaction of ozone with unsaturated alcohols in air has been investigated at atmospheric pressure and ambient temperature (288–291 K). Cyclohexane was added to scavenge the hydroxyl radical which forms as a product of the ozone–unsaturated alcohol reaction. The reaction rate constants, in units of 10?18 cm3 molecule?1 s?1, are 16.2 ± 0.7 for (±) 3-buten-2-ol, 17.9 ± 1.8 for 1-penten-3-ol, 10.0 ± 0.3 for 2-methyl-3-buten-2-ol, 169 ± 25 for cis-2 penten-1-ol, and 251 ± 41 for 2-buten-1-ol (mixture of isomers). Substituent effects on reactivity are discussed. The reactivity of unsaturated alcohols towards ozone is similar to that of their alkene structural homologues. Implications of these results with respect to the atmospheric persistence of unsaturated alcohols are briefly discussed. © 1994 John Wiley & Sons, Inc. 相似文献
5.
R. R. Gataullin A. M. Sotnikov L. V. Spirikhin I. B. Abdrakhmanov 《Russian Journal of Organic Chemistry》2005,41(5):715-722
N-Mesyl-2-(1-methyl-1-butenyl)-6-methylaniline reacted with Br2 to afford N-mesyl-2-(3-bromo-1-penten-2-yl)aniline that under treatment with NH3 or amines underwent cyclization into N-mesyl-7-methyl-3-methylene-2-ethylindoline. The reaction of N-mesyl-2-(1-methyl-1-buten-1-yl)-4-methyl- and 2-(1-methyl-1-buten-1-yl)aniline with Br2 gave rise to the corresponding N-mesyl-2-(2-bromo-1-methyl-1-buten-1-yl)anilines. Under the similar conditions N-tosyl-2-(1-cyclohexen-1-yl)aniline was converted into N-tosyl-2-(6-bromo-1-cyclohexen-1-yl)aniline that under treatment with NH3 furnished N-tosyl-1,2,3,9a-tetrahydrocarbazole. The reaction of N-mesyl-1,2,3,9a-tetrahydrocarbazole with CuBr2 in MeOH afforded N-mesyl-4-methoxy-1,2,3,4-tetrahydrocarbazole. N-Mesyl-6-methyl-2-(1-cyclopenten-1-yl)aniline in reaction with Br2 in the presence of NaHCO3 was oxidized into the corresponding cyclopentenone, and with NBS it gave N-mesyl-2-(2-bromo-1-cyclopenten-1-yl)aniline.__________Translated from Zhurnal Organicheskoi Khimii, Vol. 41, No. 5, 2005, pp. 730–737.Original Russian Text Copyright © 2005 by Gataullin, Sotnikov, Spirikhin, Abdrakhmanov. 相似文献
6.
A. S. Arakelyan A. I. Dvoryanchikov A. A. Gevorkyan 《Chemistry of Heterocyclic Compounds》1989,25(6):604-605
The reaction of isoprene, hydrogen peroxide, and commercial hydrobromic acid gives 1-bromo-2-methyl-3-buten-2-ol, the low-temperature dehydrobromination of which gives isoprene oxide in high yield.Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 6, pp. 736–737, June, 1989. 相似文献
7.
Johannes Reisch Akkinepalli Raghu Ram Rao Cyril Odianose Usifoh 《Monatshefte für Chemie / Chemical Monthly》1994,125(1):79-83
Summary The reaction of theophylline (1) with 2-methyl-3-butyn-2-ol and 1-butyn-3-ol under Mitsunobu conditions gave the respective 9-substituted derivatives 9-[2-(2-methyl-3-butynyl)]-theophylline (2) and 9-[2-(3-butynyl)]-theophylline (3). On reaction with 2-methyl-3-buten-2-ol, theophylline yielded in addition to the 9-[2-(2-methyl-3-butenyl)]-theophylline (4), two more cyclic products, identified as 1,5,5a,8-tetrahydro-1,3,8,8-tetramethyl-2H-pyrrolo[1,2-e]purine-2,4(3H)-dione (5) and 8a,9-dihydro-1,3,6,6-tetramethyl-1H-pyrrolo[2,1-f]purine-2,4(3H,6H)-dione (7).
Acetylenchemie, 32. Mitt.: Alkinylierung und cyclische Umlagerung von Theophyllin mit ungesättigten Alkoholen mittels Mitsunobu-Reaktion
Zusammenfassung Die Reaktion von Theophyllin (1) mit 2-Methyl-3-butin-2-ol und 1-Butin-2-ol unter Mitsunobu-Bedingungen führte zu den 9-substituierten Derivaten 9-[2-(2-Methyl-3-butinyl)]-theophyllin (2) bzw. 9-[2-(3-Butinyl)]-theophyllin (3). Bei der Reaktion mit 2-Methyl-3-buten-2-ol ergab Theophyllin außer 9-[2-(2-Methyl-3-butenyl)]-theophyllin (4) noch zwei weitere cyclisierte Produkte, die als 1,3,8,8-Tetramethyl-1,5,5a,8-tetrahydro-pyrrolo[1,2-e]purin-2,4(3H)-dion (5) und 1,3,6,6-Tetramethyl-8a,9-dihydro-1H,6H-pyrrolo[2,1-f]purin-2,4-dion (7) identifiziert wurden.相似文献
8.
Z. G. Isaeva A. N. Karaseva V. V. Karlin L. A. Savukhina 《Russian Chemical Bulletin》1986,35(9):1947-1949
Conclusions The oxidation of 1-methylcycloheptene by SeO2 and Hg(OAc)2 gave a mixture of 1-hydroxymethyl-2-cyclohepten-1-ol and 3-methyl-2-cyclohepten-1-ol.Translated from Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, No. 9, pp. 2134–2136, September, 1986. 相似文献
9.
G. Bouchoux Y. Hoppilliard R. Flammang A. Maquestiau P. Meyrant 《Journal of mass spectrometry : JMS》1983,18(8):340-344
It is demonstrated by means of collisionally activated decomposition (CAD) that [C3H5O]+ originating from metastable [C4H8O]+˙ ions are either acylium [C2H5CO]+ (a) or hydroxycarbenium [CH2CHCHOH]+ (b). Butanone gives exclusively a but 2-methyl-2-propen-1-ol, 2-buten-1-ol, 3-buten-1-ol, butanal and 2-methylpropanal lead to ion b. Both structures a and b are produced from 3-buten-2-ol. These results are discussed in conjunction with experimental and calculated (MINDO/3) thermodynamic data. 相似文献
10.
U. G. Ibatullin Yu. V. Pavlov M. G. Safarov 《Chemistry of Heterocyclic Compounds》1989,25(10):1107-1109
3-Methyl-3-buten-1-ol reacts with various aldehydes and ketones on silica gel and Al2O3 surfaces in the absence of solvents and conventional catalysts for this reaction to form derivatives of di- and tetrahydropyrans.Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 10, pp. 1326–1328, October, 1989. 相似文献
11.
Conclusions The kinetic regularities of hydration of 3-methyl-3-buten-1-ol in 9.6 to 34% aqueous solutions of sulfuric acid at 25°C were studied. An equation was found for describing the influence of the medium on the value of the effective rate constant of hydration of 3-methyl-3-buten-1-ol.Translated from Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, No. 5, pp. 1016–1019, May, 1988. 相似文献
12.
Adriana Ionescu 《Journal of organometallic chemistry》2006,691(18):3806-3815
The ω-hydroxyolefins 3-buten-1-ol, 3-buten-1-methyl-1-ol and 4-penten-1-ol were subjected to hydroxycarbonylation conditions in water in the presence of PdCl2(PhCN)2 and 4-8 equiv. of water soluble tris(3-sodiumsulfonatophenyl)phosphine (TPPTS), or N-bis(N′,N′-diethyl-2-aminoethyl)-4-aminomethylphenyl-diphenylphosphine (N3P). Under conditions of high conversion, the olefins primarily undergo isomerisation through a chain walking mechanism with selectivities for aldehyde ranging from 65% to 98%, with the lower values for longer chain alcohols. The lactones formed as the minor product are almost exclusively branched, indicating that in the first step 2,1-insertion is strongly favoured over 1,2-insertion. In the N3P system also linear lactone is produced at lower conversion. Running the reaction in D2O produces multiple deuterium incorporation in all positions of the carbon chain. A mechanism is discussed. 相似文献
13.
The formation of di- and tetrahydropyrans on an oxide surface in the reaction of 3-methyl-3-buten-1-ol with carbonyl compounds is due primarily to the adsorptive properties of the surface itself, Lewis acid centers hardly catalyzing this reaction at all under the conditions being considered.See [1] for Communication 1 of the series.Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 2, pp. 183–186, February, 1990. 相似文献
14.
K. I. Kuchkova A. N. Aryku I. P. Dragalin P. F. Vlad 《Chemistry of Natural Compounds》2005,41(2):190-193
Drim-9(11)-en-8α-ol and drim-9(11)-en-8β-ol were synthesized in six steps from drimenol. Drimenol was oxidized by P2O5 and DMSO to drimenal, which isomerized with p-TsOH into isodrimenal. Isodrimenal was reduced by NaBH4 into isodrimenol, epoxidation of which by m-CPBA gave a mixture (3.4:1) of α- and β-epoxyisodrimenols. These reacted with tosyl chloride in Py to give a mixture of α- and β-epoxyisodrimenol tosylates. Treatment of the tosylate mixture with KI and then Ph3P produced a mixture of drim-9(11)-en-8α- and -8β-ols that was separated chromatographically. The overall yield was ∼26%.__________Translated from Khimiya Prirodnykh Soedinenii, No. 2, pp. 152–155, March–April, 2005. 相似文献
15.
Sandrine Bouquillon Ulla Létinois-Halbes Jacques Muzart 《Journal of organometallic chemistry》2003,687(2):377-383
The reaction between palladium acetate, (−)-ephedrine and potassium acetate led to bis-chelate complex Pd[OCH(Ph)NH(Me)]2 whose the trans-structure is obtained from calculations. The use of this complex to catalyze either the 1,4-hydrogenation of (E)-2-benzyliden-1-tetralone or Heck reaction of phenyl iodide with 3-methyl-3-buten-2-ol led to a low enantiomeric excess. 相似文献
16.
Fluoro-organic Syntheses VI: The Solvolysis of Chlorofluoro-cyclopropanes 2-Fluoro-allylic carbocations, generated from 1-chloro-1-fluoro-cyclopropanes or 2-fluoro-allyl p-toluene-sulfonates in water or acetic acid, undergo either proton loss or addition of hydroxyl or acetoxyl. In the latter case, an alkyl-substituted 2-fluoro-allyl ion leads predominantly to the more branched product (e.g. 3-fluoro-2-methyl-3-buten-2-ol) which may be converted into the less branched one (e.g. 2-fluoro-3-methyl-2-buten-2-ol) through reversible reactions. 相似文献
17.
N. S. Prostakov Gabriel Alvarado Urbina L. A. Gaivoronskaya V. P. Zvolinskii M. A. Galiullin 《Chemistry of Heterocyclic Compounds》1977,13(9):1003-1005
Reduction of 3-methyl-9-(o-tolyl)-2-azafluoren-9-ol (I) with tin in hydrochloric acid gave 3-methyl-9-(o-tolyl)-2-azafluorene, dehydrocyclization of which on a K-16 catalyst at 520–500°C gave a complex mixture, from which four substances — 2-methylbenzo[f]-3-azafluoranthene, 11-methylbenzo[f]-10-azafluoranthene, benzo[f]-3-azafluoroanthene (II), and I-were isolated and identified by means of the IR, UV, and PMR, and mass spectra. It is shown that the dehydrocyclization proceeds through the hydrogen atoms of the methyl group of the tolyl substituent and takes place at the 8-C or 1-C atom of the azafluorene system. The formation of products II and I constitutes evidence that the reaction is accompanied by partial demethylation or oxidation.Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 9, pp. 1245–1247, September, 1977. 相似文献
18.
Conclusions The simple synthesis of optically active R,Z-14-methyl-8-hexadecenal (cis-trogodermal), the principal components of the aggregation pheromone ofTrogoderma granarium, was accomplished. The synthesis was based on the use of R-1-bromo-4-methylhexane and Z-4-chloro-2-buten-1-ol as the sources of the chiral and olefin fragments.Translated from Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, No. 4, pp. 906–910, April, 1987. 相似文献
19.
Conclusions The oxidation of isoprene proceeds regioselectively with the formation of 2-methyl-2-buten-1-ol. This oxidation is more rapid for isoprene than for 2-methyl-2-pentene.Translated from Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, No. 1, pp. 214–215, January, 1986. 相似文献
20.
Conclusions The telomerization of allene with water catalyzed by palladium complexes leads to the preparation of 3-methyl-2-methylene-3-buten-1-ol and 2,3,6,7-tetramethylene-1-octanol in high yields.Translated from Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, No. 11, pp. 2624–2626, November, 1985. 相似文献