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Relevant bibliographies by topics / 1;2 dioxolane

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Dissertations / Theses
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Academic literature on the topic '1;2 dioxolane'

Author: Grafiati

Published: 4 June 2021

Last updated: 1 February 2022

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Journal articles on the topic "1;2 dioxolane"

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Norbeck, Daniel W., Stephen Spanton, Samuel Broder та Hiroaki Mitsuya. "(±)-Dioxolane-T ((±)-1-[(2β,4β)-2-(hydroxymethyl)-4-dioxolanyl]thymine)". Tetrahedron Letters 30, № 46 (1989): 6263–66. http://dx.doi.org/10.1016/s0040-4039(01)93868-7.

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Castro, Juan, Pablo Linares-Palomino, Sofía Salido, Joaquín Altarejos, Manuel Nogueras, and Adolfo Sánchez. "2-(1-Bromo-1-methyl-ethyl)-2-methyl-[1,3]dioxolane." Molbank 2004, no. 1 (2004): M387. http://dx.doi.org/10.3390/m387.

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Giles, Robin G. F., Ivan R. Green, and Shuk-Hui Li. "Stereoselective Isomerizations of 4-(2´-Chloro-3´-methoxyphenyl)-2,5-dimethyl-1,3-dioxolanes: Stereochemistry and Conformation of the Product 2-Benzopyrans." Australian Journal of Chemistry 58, no. 8 (2005): 565. http://dx.doi.org/10.1071/ch05120.

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Stereoselective isomerization of rel-(2R,4S,5R)-4-(2′-chloro-3′-methoxyphenyl)-2,5-dimethyl-1,3-dioxolane 5 with titanium(iv) chloride afforded solely rel-(1R,3R,4S)-5-chloro-4-hydroxy-6-methoxy-1,3-dimethyl-2-benzopyran 17 in high yield in which the conformation adopted by the dihydropyran ring minimized peri-interactions through stereochemistries that were axial for the C-3 methyl, pseudoaxial for the C-4 hydroxy and pseudoequatorial for the C-1 methyl groups. Similar isomerization of the individual rel-(2S,4R,5R)- and rel-(2R,4R,5R)-diastereoisomeric dioxolanes 6 and 7 gave solely the corresponding rel-(1S,3R,4R)-2-benzopyran 25 in which the orientations of the substituents at C-3, C-4 and C-1 were equatorial, pseudoaxial and pseudoequatorial respectively. These observations differed significantly from those previously made for the related isomerizations of the corresponding 4-(2′-chloro-5′-methoxyphenyl)-2,5-dimethyl-1,3-dioxolanes.

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Xie, Xue-Qun, Chun-Long Yang, Jin-Xiang Luo, and Qian-Jin Li. "1-{[1-(2,4-Dichlorophenyl)-1,3-dioxolan-2-yl]methyl}-1H-1,2,4-triazole." Acta Crystallographica Section E Structure Reports Online 62, no. 7 (2006): o2858—o2859. http://dx.doi.org/10.1107/s1600536806021386.

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In the title compound, C12H11Cl2N3O2, also referred to as azaconazole, the five-membered 1,3-dioxolane ring assumes an envelope conformation. In the crystal packing, the molecules are linked into an extended three-dimensional network by weak C—H...O interactions.

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Bazmi, Holly Z., Jennifer L. Hammond, Socrates C. H. Cavalcanti, Chung K. Chu, Raymond F. Schinazi та John W. Mellors. "In Vitro Selection of Mutations in the Human Immunodeficiency Virus Type 1 Reverse Transcriptase That Decrease Susceptibility to (−)-β-d-Dioxolane-Guanosine and Suppress Resistance to 3′-Azido-3′-Deoxythymidine". Antimicrobial Agents and Chemotherapy 44, № 7 (2000): 1783–88. http://dx.doi.org/10.1128/aac.44.7.1783-1788.2000.

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ABSTRACT Human immunodeficiency virus type 1 (HIV-1) isolates resistant to (−)-β-d-dioxolane-guanosine (DXG), a potent and selective nucleoside analog HIV-1 reverse transcriptase (RT) inhibitor, were selected by serial passage of HIV-1LAI in increasing drug concentrations (maximum concentration, 30 μM). Two independent selection experiments were performed. Viral isolates for which the DXG median effective concentrations (EC50s) increased 7.3- and 12.2-fold were isolated after 13 and 14 passages, respectively. Cloning and DNA sequencing of the RT region from the first resistant isolate identified a K65R mutation (AAA to AGA) in 10 of 10 clones. The role of this mutation in DXG resistance was confirmed by site-specific mutagenesis of HIV-1LAI. The K65R mutation also conferred greater than threefold cross-resistance to 2′,3′-dideoxycytidine, 2′,3′-dideoxyinosine, 2′,3′-dideoxy-3′-thiacytidine, 9-(2-phosphonylmethoxyethyl)adenine, 2-amino-6-chloropurine dioxolane, dioxolanyl-5-fluorocytosine, and diaminopurine dioxolane but had only marginal effects on 3′-azido-3′-deoxthymidine (AZT) susceptibility. However, when introduced into a genetic background for AZT resistance (D67N, K70R, T215Y, T219Q), the K65R mutation reversed the AZT resistance. DNA sequencing of RT clones derived from the second resistant isolate identified the L74V mutation, previously reported to cause ddI resistance. The L74V mutation also decreased the AZT resistance when the mutation was introduced into a genetic background for AZT resistance (D67N, K70R, T215Y, T219Q) but to a lesser degree than the K65R mutation did. These findings indicate that DXG and certain 2′,3′-dideoxy compounds (e.g., ddI) can select for the same resistance mutations and thus may not be optimal for use in combination. However, the combination of AZT with DXG or its orally bioavailable prodrug (−)-β-d-2,6-diaminopurine-dioxolane should be explored because of the suppressive effects of the K65R and L74V mutations on AZT resistance.

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Kavitha, Channappa N., Jerry P. Jasinski, Brian J. Anderson, H. S. Yathirajan, and Manpreet Kaur. "Bis{4-[(1,3-benzodioxol-5-yl)methyl]piperazin-1-yl}methane." Acta Crystallographica Section E Structure Reports Online 69, no. 11 (2013): o1669. http://dx.doi.org/10.1107/s1600536813028109.

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In the title compound, C25H32N4O4, both piperazine rings adopt a chair conformation. One of dioxolane ring systems is essentially planar [dihedral angle = 0.9 (2)°] while the other adopts a slightly disordered envelope conformation, the mean plane of the dioxolane ring being twisted by 3.6 (2)° from that of the benzene ring. The dihedral angle between the benzene rings is 69.9 (5)°. No classical hydrogen bonds were observed.

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Zhang, Cong Cong, Pan Pan Ren, and Shou Zhi Pu. "Synthesis and Properties of 1-[(2-Methyl-5-Dioxolane)-1-Thienyl]-2-[(2-Methyl)-5-(4-Methoxy)Phenyl-3-Thienyl]perfluorocyclopentene." Applied Mechanics and Materials 473 (December 2013): 97–100. http://dx.doi.org/10.4028/www.scientific.net/amm.473.97.

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An unsymmetrical photochromic diarylethene which called 1-[(2-methyl-5-dioxolane)-3-thienyl]-2-[(2-methyl)-5-(4-methoxyphenyl)-3-thienyperfluorocyclo-pentene was synthesized and its photochromic properties were examined in detail. The result demonstrate that the diarylethene changed the color from colorless to blue violt upon irradiation with 297 nm UV light, in which absorption maxima were observed at 552 nm and 563 nm in hexane and PMMA films, respectively. This photochromic compound also exhibited remarkable fluorescence switching both in hexane solution and in PMMA films.

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Borbulevych, O. Ya, O. V. Shishkin, and V. N. Knyazev. "4-Triethylammoniomethyl-1,3-dioxolane-2-spiro-1'-2',4',6'-trinitrocyclohexadienide." Acta Crystallographica Section C Crystal Structure Communications 55, no. 11 (1999): 1918–20. http://dx.doi.org/10.1107/s0108270199009233.

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García-Hernández, Zureima, and François P. Gabbaï. "Synthesis and Properties of 2-(Dimesitylboryl)benzylideneamines." Zeitschrift für Naturforschung B 64, no. 11-12 (2009): 1381–86. http://dx.doi.org/10.1515/znb-2009-11-1219.

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Lithiation of 2-(2-bromophenyl)-dioxolane (1) followed by reaction with dimesitylboron fluoride afforded 2-(2-dimesitylborylphenyl)-dioxolane (2) which was deprotected to afford 2- dimesitylboryl-benzaldehyde (3). Compound 3 reacts with aliphatic amines such as n-butylamine and ethanolamine to afford the corresponding imines 2-(dimesitylboryl)benzylidenebutylamine (4) and 2-(dimesitylboryl)benzylideneethanolamine (5), respectively. Structural studies indicate coordination of the imine-nitrogen atom to the boron center. Imines 4 and 5 emit a green fluorescence near 510 nm with quantum yields approaching 10%. TD-DFT calculations suggest that this emission arises from an intramolecular charge-transfer excited state

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Feng, Er Ting, Rui Min Lu, and Cong Bin Fan. "Synthesis and Photochromic Properties of 1-[2-Cyano-1,5-Dimethyl-4-Pyrryl]-2-[2-Methyl-5-(1,3-Dioxolane)-3-Thienyl] Perfluorocyclopentene." Advanced Materials Research 1142 (January 2017): 71–74. http://dx.doi.org/10.4028/www.scientific.net/amr.1142.71.

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A new unsymmetrical photochromic diarylethene 1-[2-cyano-1, 5-dimethyl-4-pyrryl] -2-[2-methyl-5-(1, 3-dioxolane)-3-thienyl] perfluorocyclopentene has been synthesized, and its properties including photochromism, kinetics and fluorescence have been investigated in detail. The results showed that its photochromic behaviors could be modulated by UV/Vis light, changing from colorless to blue in acetonitrile solution.

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Dissertations / Theses on the topic "1;2 dioxolane"

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Hong, Jang-Hsing, and 洪政信. "1.Sequential "Double Michael" Additions of Dienolates to Fulvene:Rapid Access to the Tricyclo[5.3.0.n2,5]Alkane Systems. 2.A Simple and Cost Effective Synthesis of 2-Cyclopentadienyliden-1,3-Dioxolane." Thesis, 1997. http://ndltd.ncl.edu.tw/handle/48867203349790626517.

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碩士<br>國立中正大學<br>化學研究所<br>85<br>AbstractPart I: Sequential "Double-Michael" Additions of Dienolates to Fulvene: Rapid Access to the Tricyclo[5.3.0.n2,5 ]Alkane SystemsThe double-Michael addition sequence outlined in this thesis provides a remarkably efficient route to the tricyclo[5.3.0.n2,5]alkane ring systems, namely the skeletons of isobarbatene and rotundenol. The dienolates anion formed by the a-deprotonation of an enone added in a Michael-like fashion to fulvene and form an anionic intermediate which was then cyclize through an intramolecular Michael reaction, affording the tricyclic ketone intermediate upon protonation. The reaction is particularly attractive in the case of the cyclopentenones as two bonds and three streocenters are formed in one step with very high stereoselectivity.Part II: A Simple and Cost Effective Synthesis of 2-Cyclopenta-dienyliden-1,3-Dioxolane A high efficient preparation of 2-cyclopentadienyliden-1,3-dioxolane from cyclopentadiene and 2-chloroethyl chloroformate has been achieved. Reaction of two equivalents of sodium cyclopentadienide with 2-chloroethyl chloroformate at 0.1 M produce the highest yield of this fulvene.Part III: Synthetic Studies on Xestovanins The first total synthesis of (-)-rosiridol as well as the conclusion of its strusture assignment have been achieved. The regio enantioselective prenylation demonstrated here in this thesis represents a new class of the catalytic enantioselective reactions. Synthesis of xestovanin glycoside was also addressed in this thesis.

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Book chapters on the topic "1;2 dioxolane"

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Demaison, J. "316 C3H6ArO2 1,3-Dioxolane - argon (1/1)." In Asymmetric Top Molecules. Part 2. Springer Berlin Heidelberg, 2011. http://dx.doi.org/10.1007/978-3-642-10400-8_64.

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Wohlfarth, Ch. "Viscosity of the mixture (1) 1,3-dioxolane; (2) 2-chlorobutane." In Supplement to IV/18. Springer Berlin Heidelberg, 2008. http://dx.doi.org/10.1007/978-3-540-75486-2_886.

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Wohlfarth, Ch. "Viscosity of the mixture (1) 1,3-dioxolane; (2) 1-chloro-2-methylpropane." In Supplement to IV/18. Springer Berlin Heidelberg, 2008. http://dx.doi.org/10.1007/978-3-540-75486-2_887.

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Wohlfarth, Ch. "Viscosity of the mixture (1) 1,3-dioxolane; (2) 1-chlorobutane." In Supplement to IV/18. Springer Berlin Heidelberg, 2008. http://dx.doi.org/10.1007/978-3-540-75486-2_885.

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Wohlfarth, Ch. "Viscosity of the mixture (1) 1,3-dioxolane; (2) 2-chloro-2-methylpropane." In Supplement to IV/18. Springer Berlin Heidelberg, 2008. http://dx.doi.org/10.1007/978-3-540-75486-2_888.

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Wohlfarth, Ch. "Viscosity of the mixture (1) 1,3-dioxolane; (2) 2-methylpropan-2-ol." In Supplement to IV/18. Springer Berlin Heidelberg, 2008. http://dx.doi.org/10.1007/978-3-540-75486-2_891.

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Wohlfarth, Ch. "Viscosity of the mixture (1) methanol; (2) 1,3-dioxolane." In Supplement to IV/18. Springer Berlin Heidelberg, 2008. http://dx.doi.org/10.1007/978-3-540-75486-2_602.

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8

Wohlfarth, Ch. "Viscosity of the mixture (1) acetonitrile; (2) 1,3-dioxolane." In Supplement to IV/18. Springer Berlin Heidelberg, 2008. http://dx.doi.org/10.1007/978-3-540-75486-2_701.

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Wohlfarth, Ch. "Viscosity of the mixture (1) ethanol; (2) 1,3-dioxolane." In Supplement to IV/18. Springer Berlin Heidelberg, 2008. http://dx.doi.org/10.1007/978-3-540-75486-2_750.

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Wohlfarth, Ch. "Viscosity of the mixture (1) 1,3-dioxolane; (2) hexane." In Supplement to IV/18. Springer Berlin Heidelberg, 2008. http://dx.doi.org/10.1007/978-3-540-75486-2_899.

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Conference papers on the topic "1;2 dioxolane"

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Li, Gang, Gang Liu, and Dao-Bin Zhang. "SYNTHESIS, PHOTOCHROMISM PROPERTIES OF 1-(2-METHYL-1-THIENYL)-2-[2-METHYL-5-(1,3-DIOXOLANE)-3-THIENYL] PERFLUOROCYCLOPENTENE." In 2015 International Conference on Material Engineering and Mechanical Engineering (MEME2015). WORLD SCIENTIFIC, 2016. http://dx.doi.org/10.1142/9789814759687_0166.

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Fu, Y. L., D. D. Xue, C. B. Fan, and S. Z. Pu. "Synthesis and Application of 1-(3, 5-dimethyl-4-isoxazolyl)-2-{2-methyl-5-[4-(1,3-dioxolane)-phenyl] -3-thienyl} Perfluorocyclopentene." In International Conference on Materials Chemistry and Environmental Protection 2015. Atlantis Press, 2016. http://dx.doi.org/10.2991/meep-15.2016.22.

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