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Artículos de revistas sobre el tema "Dimethylketene"

Autor: Grafiati
Publicado: 4 de junio de 2021
Última modificación: 1 de febrero de 2022

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1

Jensen, James O. "Vibrational frequencies and structural determination of dimethylketene." Journal of Molecular Structure: THEOCHEM 714, no. 1 (2005): 13–19. http://dx.doi.org/10.1016/j.theochem.2004.08.058.

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2

Datta, Sagnik, and H. Floyd Davis. "Dimethylcarbene versus Direct Propene Formation in Dimethylketene Photodissociation." Journal of Physical Chemistry A 125, no. 32 (2021): 6940–48. http://dx.doi.org/10.1021/acs.jpca.1c03641.

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3

Revis, Anthony, and Terrence K. Hilty. "Improved synthesis of dimethylketene trimethylsilyl acetals by rhodium-catalyzed hydrosilylation." Journal of Organic Chemistry 55, no. 9 (1990): 2972–73. http://dx.doi.org/10.1021/jo00296a080.

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4

Nguyen, Minh Tho, and Hue Minh Thi Nguyen. "On the heats of formation of methylketene, dimethylketene and related cations." Chemical Physics Letters 300, no. 3-4 (1999): 346–50. http://dx.doi.org/10.1016/s0009-2614(98)01391-8.

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5

Traeger, John C. "Neutral and cationic heats of formation for ketene, methylketene, and dimethylketene." International Journal of Mass Spectrometry 194, no. 2-3 (2000): 261–67. http://dx.doi.org/10.1016/s1387-3806(99)00155-4.

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6

Hatakeyama, Shiro, Shigeo Honda, and Hajime Akimoto. "Reactions of Ketene, Methylketene, Ethylketene, and Dimethylketene with Ozone in Air." Bulletin of the Chemical Society of Japan 58, no. 8 (1985): 2411–12. http://dx.doi.org/10.1246/bcsj.58.2411.

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7

Delamere, C., C. Jakins, and E. Lewars. "On the generation of oxirene and dimethyloxirene by retro-Diels–Alder reactions, and reactions of dimethyloxirene: a computational study." Canadian Journal of Chemistry 80, no. 1 (2002): 94–105. http://dx.doi.org/10.1139/v01-194.

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The isomerization of oxirene (oxacyclopropene) (1) to ketene, dimethyloxirene (7) to dimethylketene via the oxo carbene ("ketocarbene"), and the retro-Diels–Alder extrusion of oxirene and dimethyloxirene from their formal adducts (9 and 24, respectively) with benzene were studied computationally. All species were optimized at the MP2(fc)/6–31G(df,p) level; the species involving 1 were also subjected to MP2(fc)/6–31G(df,p) frequency and single-point CCSD(T)/6–31G(df,p) calculations. At the CCSD(T)/6–31G(df,p)//MP2(fc)/6–31G(df,p) level 1 isomerized to ketene in one step with a barrier of 2.8 kJ
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8

Brestaz, Marc, Nicolas Desilles, Guillaume Le та Claude Bunel. "Polyester from dimethylketene and acetaldehyde: Direct copolymerization and β-lactone ring-opening polymerization". Journal of Polymer Science Part A: Polymer Chemistry 49, № 19 (2011): 4129–38. http://dx.doi.org/10.1002/pola.24854.

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9

Goulay, Fabien, Adeeb Derakhshan, Eamonn Maher, et al. "Formation of dimethylketene and methacrolein by reaction of the CH radical with acetone." Physical Chemistry Chemical Physics 15, no. 11 (2013): 4049. http://dx.doi.org/10.1039/c3cp43829e.

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10

Wang, Hanbin, Nicolas Desilles, Nadège Follain, Stéphane Marais, and Fabrice Burel. "Dimethylketene-based aliphatic polyketones: Copolymers and star-shaped polymers potentially useful in food packaging." European Polymer Journal 85 (December 2016): 411–20. http://dx.doi.org/10.1016/j.eurpolymj.2016.10.044.

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11

Fujisawa, Jun, Shin Sato, Kazuo Shimokoshi, and Tadamasa Shida. "Environment Effects on the ESR Spectrum of the Cation Radical of Dimethylketene in Low Temperature Matrices." Bulletin of the Chemical Society of Japan 58, no. 4 (1985): 1267–72. http://dx.doi.org/10.1246/bcsj.58.1267.

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12

Collins, DJ, JD Cullen, and GM Stone. "The Structure and Function of Estrogens .10. Synthesis of 5,5-Dimethyl-Cis-4b,5,6,10b,11,12-Hexahydrochrysene-2,8-Diol - the Estrogenic Activity of This and of Related C-Methylated Hydrochrysenediols." Australian Journal of Chemistry 41, no. 5 (1988): 745. http://dx.doi.org/10.1071/ch9880745.

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Reaction of 6-methoxy-2-(p- methoxyphenyl )-3,4-dihydronaphthalen-1(2H)- one (9) with dimethylketene ethyl trimethylsilyl acetal (10) in the presence of titanium tetrachloride gave ethyl 2-methyl-2-[6?-methoxy- 2?-(p- methoxyphenyl )-3?,4?-dihydronaphthalen-1?-yl] propanoate (11) which upon treatment with methanesulfonic acid afforded the lactone (13). Reduction of (11) with lithium/ammonia yielded mainly 6-methoxy- 2-(p- methoxyphenyl )-1,2,3,4-tetrahydronaphthalene (16), but hydrogenation of (11) over palladium/charcoal gave 61% of ethyl (1?RS,2?RS)-2-methyl-2-[6?-methoxy-2?-(p- methoxypheny
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13

Pan, Y. Vickie, and Denice D. Denton. "Dimethylketene: Plasma-generated gas-phase precursor of photoluminescence chromophores in plasma polymerized films of methyl methacrylate and tetramethyl-1,3-cyclobutanedione." Plasmas and Polymers 2, no. 3 (1997): 165–75. http://dx.doi.org/10.1007/bf02766152.

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14

Fujisawa, Tamotsu, Kazuto Umezu, Masahiro Suzuki та Toshio Sato. "Lithiated Dimethylketene Diisopropyl Dithioacetal as a Synthon of Homoenolate Dianion of Isobutyric Ester. An Application to the Synthesis of α-Methylenelactones". Chemistry Letters 15, № 10 (1986): 1675–78. http://dx.doi.org/10.1246/cl.1986.1675.

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15

Wang, Hanbin, Nicolas Desilles, and Fabrice Burel. "Effect of tetra-n -butylammonium bromide salt on the cationic polymerization of dimethylketene and on the thermal properties of the obtained polyketones." Journal of Polymer Science Part A: Polymer Chemistry 52, no. 10 (2014): 1493–99. http://dx.doi.org/10.1002/pola.27144.

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16

Jiang, Bo, Nicolas Desilles, and Fabrice Burel. "High Molecular Weight Polyester Obtained by Polymerization of Dimethylketene Using Metallocene Initiators: A Step toward Ziegler–Natta Supporting Application in Non‐Olefin Systems." Macromolecular Rapid Communications 40, no. 20 (2019): 1900293. http://dx.doi.org/10.1002/marc.201900293.

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17

Pietanza, Sergio, Donato Sorgente, and Gianluca Percoco. "Enhancing the sustainability of chemical vapour polishing of additive manufactured ABS parts using a vacuum chamber." Rapid Prototyping Journal 23, no. 6 (2017): 1043–50. http://dx.doi.org/10.1108/rpj-12-2015-0200.

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Purpose In this paper, the authors propose an experimental set-up to study the chemical vapour polishing technique confining pure dimethylketone atmosphere at a fixed temperature in a vacuum chamber. The purpose of this paper is to improve conventional vapour treatments lowering the amount of solvent, lowering time and temperature needed and improving the environmental impact of the technique. Design/methodology/approach A factorial design of experiments is adopted to understand the effect of the treatment on roughness and on the surface morphology of treated specimens. Findings The proposed m
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18

Que, Xuchu, Juan C. Engel, David Ferguson, Annette Wunderlich, Stanislas Tomavo, and Sharon L. Reed. "Cathepsin Cs Are Key for the Intracellular Survival of the Protozoan Parasite, Toxoplasma gondii." Journal of Biological Chemistry 282, no. 7 (2006): 4994–5003. http://dx.doi.org/10.1074/jbc.m606764200.

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Cysteine proteases play key roles in apicomplexan invasion, organellar biogenesis, and intracellular survival. We have now characterized five genes encoding papain family cathepsins from Toxoplasma gondii, including three cathepsin Cs, one cathepsin B, and one cathepsin L. Unlike endopeptidases cathepsin B and L, T. gondii cathepsin Cs are exopeptidases and remove dipeptides from unblocked N-terminal substrates of proteins or peptides. TgCPC1 was the most highly expressed cathepsin mRNA in tachyzoites (by real-time PCR), but three cathepsins, TgCPC1, TgCPC2, and TgCPB, were undetectable in in
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19

Kpomah, B., and D. Kpomah. "Synthesis, Characterization and Antifungal Studies of Transition Metal Complexes of Dimethylketone Thiosemicarba zone with 1, 10-Phenanthroline." Journal of Pharmaceutical and Applied Chemistry 4, no. 1 (2018): 47–55. http://dx.doi.org/10.18576/jpac/040107.

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20

Brestaz, Marc, Nicolas Desilles, Guillaume Le, and Claude Bunel. "Polyester obtained from dimethylketene and acetone: synthesis and characterization." Journal of Polymer Research 19, no. 11 (2012). http://dx.doi.org/10.1007/s10965-012-0012-5.

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21

STADLER, H., M. REY, and A. S. DREIDING. "ChemInform Abstract: ADDITION OF DIMETHYLKETENE TO 6-HETEROSUBSTITUTED FULVENES. SYNTHESIS OF (.+-.)-FILIFOLONE." Chemischer Informationsdienst 16, no. 7 (1985). http://dx.doi.org/10.1002/chin.198507332.

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22

REVIS, A., and T. K. HILTY. "ChemInform Abstract: Improved Synthesis of Dimethylketene Trimethylsilyl Acetals by Rhodium-Catalyzed Hydrosilylation." ChemInform 21, no. 41 (1990). http://dx.doi.org/10.1002/chin.199041229.

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23

GETTINS, A. F., N. A. HASHI, D. P. STOKES, G. A. TAYLOR, and K. J. WYSE. "ChemInform Abstract: Ketene. Part 24. The Reactions of N-(Fluoren-9-ylidene)methylamine N-Oxide with Dimethylketene and Ketene." Chemischer Informationsdienst 17, no. 8 (1986). http://dx.doi.org/10.1002/chin.198608140.

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24

FUJISAWA, T., K. UMEZU, M. SUZUKI та T. SATO. "ChemInform Abstract: Lithiated Dimethylketene Diisopropyl Dithioacetal as a Synthon of Homoenolated Dianion of Isobutyric Ester. An Application to the Synthesis of α-Methylenelactones." ChemInform 18, № 17 (1987). http://dx.doi.org/10.1002/chin.198717183.

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25

Jiang, Bo, Nicolas Desilles, and Fabrice Burel. "Ketene-based aliphatic polyketones obtained by cationic copolymerization of dimethylketene (DMK) with diethylketene (DEK) or diphenylketene (DPK): synthesis, characterization and reactivity ratio estimation." Journal of Polymer Research 27, no. 10 (2020). http://dx.doi.org/10.1007/s10965-020-02283-2.

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