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Journal articles on the topic 'Type II Intramolecular Diels-Alder reaction'

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Published: 4 June 2021
Last updated: 19 February 2022

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1

Ward, Dale E., Thomas E. Nixey, Yuanzhu Gai, Matthew J. Hrapchak, and M. Saeed Abaee. "Intramolecular Diels–Alder reactions of 2H-thiopyran dienes." Canadian Journal of Chemistry 74, no. 7 (1996): 1418–36. http://dx.doi.org/10.1139/v96-160.

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A systematic survey of IMDA reactions of 4-[tris(2-methylethyl)silyl]oxy-2H-thiopyran derivatives with potential dienophiles tethered at the C-2, C-3, C-5, and C-6 positions is presented. Cycloaddition was not observed with a C3 or C4 tether and an unactivated terminal olefin as dienophile. IMDA adducts could be obtained when dienophiles activated by a carbomethoxy group were employed. Compounds having the activated dienophile attached via a C3 tether to C-2 of the 2H-thiopyran gave adducts with high stereoselectivity. Substrates having the dienophile attached to C-3 with a C3 or C4 tether cyc
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2

Shen, Mei-Hua, Yu-Mei Zhang, Chun Jiang, Hua-Dong Xu, and Defeng Xu. "Ag-Catalyzed cycloisomerization of 1,6-enynamide: an intramolecular type II Alder-ene reaction." Organic Chemistry Frontiers 7, no. 1 (2020): 73–75. http://dx.doi.org/10.1039/c9qo01258c.

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An unusual type II Alder-ene cycloisomerization of 1,6-enynamide to fused bicyclic N-heterocycles is achieved by silver catalysis. 6-Endo-trig cyclization of a keteneiminium silver intermediate is proposed as the key step.
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3

Ohba, Masashi, and Rie Izuta. "Effect of Copper(II) Triflate on Intramolecular Diels-Alder Reaction of Oxazole-Olefins." HETEROCYCLES 55, no. 5 (2001): 823. http://dx.doi.org/10.3987/com-01-9159.

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4

Mun, Hyeon Jin, Eun Young Seong, Kwang-Hyun Ahn, and Eun Joo Kang. "Fe(II)/Fe(III)-Catalyzed Intramolecular Didehydro-Diels–Alder Reaction of Styrene-ynes." Journal of Organic Chemistry 83, no. 3 (2018): 1196–203. http://dx.doi.org/10.1021/acs.joc.7b02672.

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5

Bear, Brian R., Steven M. Sparks, and Kenneth J. Shea. "The Type 2 Intramolecular Diels-Alder Reaction: Synthesis and Chemistry of Bridgehead Alkenes." Angewandte Chemie International Edition 40, no. 5 (2001): 820–49. http://dx.doi.org/10.1002/1521-3773(20010302)40:5<820::aid-anie820>3.0.co;2-f.

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6

Sparks, Steven M., Jesse D. Vargas, and Kenneth J. Shea. "Type 2 Intramolecular Nitroso Diels−Alder Reaction. Synthesis and Structure of Bridgehead Oxazinolactams." Organic Letters 2, no. 10 (2000): 1473–75. http://dx.doi.org/10.1021/ol005811m.

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7

Padwa, Albert, William S. Kissell, and Cheryl K. Eidell. "Cyclization–cycloaddition cascades for the construction of azapolycyclic ring systems." Canadian Journal of Chemistry 79, no. 11 (2001): 1681–93. http://dx.doi.org/10.1139/v01-154.

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Cyclic 2-amidofuranones were obtained from the Rh(II)-catalyzed reaction of alpha-diazoketo substituted pyrrolidine derivatives. These compounds are derived by a [1,4]-hydrogen transfer from an initially formed carbonyl ylide dipole. Acylation of the amido-substituted furanone with pivalyl chloride provided a fused amidofuran, which underwent bimolecular Diels-Alder cycloaddition with N-phenylmaleimide. The Rh(II)-catalyzed decomposition of ethyl 2-diazo-3-oxo-(2-oxo-1-pent-4-enoyl-pyrrolidine-3-yl)propionate was also examined. In this case, the alkenyl group tethered to the amido carbonyl und
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8

Nakamura, Hugh, Manami Kawakami, Chihiro Tsukano, and Yoshiji Takemoto. "Construction of the ACDE Ring System of Calyciphylline A-type Alkaloids via Intramolecular Diels–Alder Reaction of a Tetrasubstituted Olefin." Synlett 30, no. 20 (2019): 2253–57. http://dx.doi.org/10.1055/s-0039-1690267.

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A concise synthesis of the ACDE tetracyclic ring system of calyciphylline A-type alkaloids was investigated. The intramolecular Diels–Alder reaction of a tetrasubstituted olefin with furan enabled the construction of the ACD ring system bearing two contiguous quaternary carbons in one step, and subsequent intramolecular [3+2] cycloaddition successfully gave the E ring.
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9

Guy, A., M. Lemaire, Y. Graillot, M. Negre, and J. P. Guette. "Stereoselectivity in intramolecular Diels-Alder reaction II: Influence of alkyl substituent on cyclization of azatrienes." Tetrahedron Letters 28, no. 26 (1987): 2969–72. http://dx.doi.org/10.1016/s0040-4039(00)96257-9.

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10

Ohba, Masashi, and Rie Izuta. "ChemInform Abstract: Effect of Copper(II) Triflate on Intramolecular Diels-Alder Reaction of Oxazole-Olefins." ChemInform 32, no. 36 (2010): no. http://dx.doi.org/10.1002/chin.200136147.

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11

Chou, Ta-shue, and Hong-Chuan Chen. "A novel “type-two” intramolecular Diels-Alder reaction leading to three-atom-bridged tricyclic pyrazoles." Tetrahedron Letters 40, no. 5 (1999): 961–64. http://dx.doi.org/10.1016/s0040-4039(98)02528-3.

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12

Sparks, Steven M., Jesse D. Vargas, and Kenneth J. Shea. "ChemInform Abstract: Type 2 Intramolecular Nitroso Diels-Alder Reaction. Synthesis and Structure of Bridgehead Oxazinolactams." ChemInform 31, no. 35 (2010): no. http://dx.doi.org/10.1002/chin.200035143.

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13

Shea, Kenneth J., and Donald R. Gauthier. "Role of chiral auxiliaries in the type 2 intramolecular Diels-Alder reaction. Influence on diastereoselectivity." Tetrahedron Letters 35, no. 40 (1994): 7311–14. http://dx.doi.org/10.1016/0040-4039(94)85301-0.

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14

Bear, Brian R., Steven M. Sparks, and Kenneth J. Shea. "ChemInform Abstract: The Type 2 Intramolecular Diels-Alder Reaction: Synthesis and Chemistry of Bridgehead Alkenes." ChemInform 32, no. 21 (2010): no. http://dx.doi.org/10.1002/chin.200121225.

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15

Williams, Peter D., and Eugene LeGoff. "Oxidation of furans II. Use of furans as masked dienophiles in the intramolecular diels-alder reaction." Tetrahedron Letters 26, no. 11 (1985): 1367–70. http://dx.doi.org/10.1016/s0040-4039(00)99046-4.

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16

Natsuki, Ken, Tadamichi Shindo, and Masahiro Toyota. "ChemInform Abstract: Practical Total Synthesis of Luotonin A (II) by Intramolecular Double Hetero Diels-Alder Reaction." ChemInform 43, no. 22 (2012): no. http://dx.doi.org/10.1002/chin.201222176.

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17

Chow, Chun P., Kenneth J. Shea, and Steven M. Sparks. "ChemInform Abstract: Type 2 Intramolecular N-Acylnitroso Diels-Alder Reaction: Stereoselective Synthesis of Bridged Bicyclic Oxazinolactams." ChemInform 33, no. 49 (2010): no. http://dx.doi.org/10.1002/chin.200249151.

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18

Nagarajan, Rajagopal, Vikram Gaddam, and Ramu Meesala. "A Rapid Intramolecular Imino Diels-Alder Reaction of Aminoanthraquinones with Citronellal or Prenylated Salicylaldehydes: Substituent Effect on Changing the Reaction Pathway from Diels-Alder to Ene-Type Cyclization." Synthesis 2007, no. 16 (2007): 2503–12. http://dx.doi.org/10.1055/s-2007-983790.

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19

SINGH, V., S. Q. ALAM, and M. PORINCHU. "ChemInform Abstract: Intramolecular Diels-Alder Reaction of Cyclohexa-2,4-dienones: Synthesis and Photochemical Reactions of Oxahomobrendanes (II)." ChemInform 27, no. 13 (2010): no. http://dx.doi.org/10.1002/chin.199613059.

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20

Stec, Markian M., Stephen L. Gwaltney, Lonnie D. Burke, Ha Nguyen, and Kenneth J. Shea. "Stereoselective synthesis of an advanced taxusin intermediate: an application of the type 2 intramolecular Diels–Alder reaction." Tetrahedron Letters 44, no. 52 (2003): 9379–82. http://dx.doi.org/10.1016/j.tetlet.2003.09.224.

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21

Horak, Yuriy I., Roman Z. Lytvyn, Yuriy V. Homza, et al. "The intramolecular Diels–Alder vinylfuran (IMDAV) reaction: a short approach to aza-analogues of pinguisane-type sesquiterpenes." Tetrahedron Letters 56, no. 30 (2015): 4499–501. http://dx.doi.org/10.1016/j.tetlet.2015.05.115.

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22

SHEA, K. J., and D. R. JUN GAUTHIER. "ChemInform Abstract: Role of Chiral Auxiliaries in the Type 2 Intramolecular Diels-Alder Reaction. Influence on Diastereoselectivity." ChemInform 26, no. 10 (2010): no. http://dx.doi.org/10.1002/chin.199510050.

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23

Rogers, Christine, and Brian A. Keay. "Diastereoselective intramolecular Diels–Alder reactions of the furan diene: the synthesis of (±)-1,4-epoxycadinane." Canadian Journal of Chemistry 71, no. 5 (1993): 611–22. http://dx.doi.org/10.1139/v93-081.

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The diastereoselective intramolecular Diels–Alder reactions of the furan diene (IMDAF), in which the side arm comprises four carbon atoms and is substituted by a methyl group adjacent to, or one carbon removed from, the furan ring, are described. Adducts are formed in moderate to excellent yields when treated with either Florisil in methylene chloride at room temperature or methylaluminum dichloride in methylene chloride at −78 °C. Florisil is most effective for substrates containing unsubstituted dienophiles. An equimolar quantity (1.1 equivalents) of methylaluminum dichloride is most effecti
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24

Miyashita, Masaaki. "Recent progress in the synthesis of bioactive polycyclic natural products." Pure and Applied Chemistry 79, no. 4 (2007): 651–65. http://dx.doi.org/10.1351/pac200779040651.

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The zoanthamine alkaloids, a type of heptacyclic marine alkaloid isolated from colonial zoanthids of the genus Zoanthus sp., have distinctive biological and pharmacological properties as well as their unique chemical structures with stereochemical complexity. Namely, norzoanthamine can suppress the loss of bone weight and strength in ovariectomized mice and has been considered a promising candidate for an antiosteoporotic drug, whereas zoanthamine has exhibited potent inhibitory activity toward phorbol myristate-induced inflammation in addition to powerful analgesic effects. Recently, norzoant
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25

Hatano, Manabu, Takahiro Horibe, Kenji Yamashita, and Kazuaki Ishihara. "Chiral Supramolecular Magnesium(II) Binaphtholate Catalysts for the Enantioselective Direct Mannich-Type Reaction and Hetero-Diels-Alder Reaction." Asian Journal of Organic Chemistry 2, no. 11 (2013): 952–56. http://dx.doi.org/10.1002/ajoc.201300190.

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26

Zhao, Yu-Ming, and Fen Zhang. "Divergent Total Syntheses of Six Ganoderma Meroterpenoids: A Bioinspired Two-Phase Strategy." Synlett 31, no. 16 (2020): 1551–54. http://dx.doi.org/10.1055/s-0040-1707898.

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We briefly highlight our recent work on the total synthesis of six Ganoderma phenolic meroterpenoids: ganocins A–C, ganocochlearins A–D, and cochlearol T. Critical to this success was a bioinspired two-phase strategy that featured an early-stage rapid construction of a common planar tricyclic intermediate and late-stage highly selective transformations of this intermediate into various Ganoderma meroterpenoids. Key steps of the synthesis include a biomimetic ortho-quinone methide intramolecular hetero-Diels–Alder reaction, a Stahl-type oxidative aromatization, a nucleophilic dearomatization of
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27

Zubkov, Fedor I., and et al. "ChemInform Abstract: The Intramolecular Diels-Alder Vinylfuran (IMDAV) Reaction: A Short Approach To Aza-Analogues of Pinguisane-Type Sesquiterpenes." ChemInform 46, no. 44 (2015): no. http://dx.doi.org/10.1002/chin.201544144.

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28

Kuehne, M. E., C. S. Brook, and D. A. Frasier. "Syntheses of Strychnos and Aspidospermatan Type Alkaloids. 4. Formation of the Pentacyclic Core by an Intramolecular Diels Alder Reaction." Natural Product Letters 4, no. 1 (1994): 65–72. http://dx.doi.org/10.1080/10575639408043894.

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29

Tsuge, Otohiko, Kazunori Ueno, and Shuji Kanemasa. "Sequential Intramolecular Diels-Alder Reaction and Intermolecular 1,3-Dipolar Cycloaddition Reaction: One-pot [6.6.5]Annelation Reaction Leading to the Formation of Polyazasteroid Type Skeletons." HETEROCYCLES 24, no. 3 (1986): 629. http://dx.doi.org/10.3987/r-1986-03-0629.

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30

Lease, Timothy G., and K. J. Shea. "The type 2 intramolecular imino Diels-Alder reaction. Synthesis and structural characterization of bicyclo[n.3.1] bridgehead olefin/bridgehead lactams." Journal of the American Chemical Society 115, no. 6 (1993): 2248–60. http://dx.doi.org/10.1021/ja00059a022.

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31

Hatano, Manabu, Takahiro Horibe, Kenji Yamashita, and Kazuaki Ishihara. "ChemInform Abstract: Chiral Supramolecular Magnesium(II) Binaphtholate Catalysts for the Enantioselective Direct Mannich-Type Reaction and Hetero-Diels-Alder Reaction." ChemInform 45, no. 16 (2014): no. http://dx.doi.org/10.1002/chin.201416032.

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32

Bakhtiari, Atefeh, and Javad Safaei-Ghomi. "Effects of Chiral Ligands on the Asymmetric Carbonyl-Ene Reaction." Synlett 30, no. 15 (2019): 1738–64. http://dx.doi.org/10.1055/s-0037-1611875.

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The carbonyl-ene reaction is one of the most well-known reactions for C–C bond formation. Based on frontier molecular orbitals (FMO), carbonyl-ene reactions occur between the highest occupied molecular orbital (HOMO) of the ene compound bearing an active hydrogen atom at the allylic center and the lowest unoccupied molecular orbital (LUMO) of the electron-deficient enophile, which is a carbonyl compound. A high activation barrier enforces the concerted ene reaction rather than a Diels–Alder reaction at high temperature. Employing a catalytic system can eliminate defects in the ene reaction, an
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33

Ohba, Masashi, Kei Fukuyama, Yuko Izumi, and Masaki Inaki. "ChemInform Abstract: Formation of the 1H-Pyrrolo[3,4-c]pyridin-1-one Skeleton (II) via Intramolecular Diels-Alder Reaction of Oxazoles (I)." ChemInform 42, no. 43 (2011): no. http://dx.doi.org/10.1002/chin.201143147.

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34

LEASE, T. G., and K. J. SHEA. "ChemInform Abstract: The Type 2 Intramolecular Imino Diels-Alder Reaction. Synthesis and Structural Characterization of Bicyclo(n.3.1) Bridgehead Olefin/ Bridgehead Lactams." ChemInform 24, no. 29 (2010): no. http://dx.doi.org/10.1002/chin.199329158.

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35

Takahashi, Kazuko, Norio Namekata, Yoshimasa Fukazawa, Kahei Takase та Emiko Mikami. "Intramolecular diels-alder reaction with inverse electron demand in 2-(2,3-diphenylcyclopropen-1-YL)-β-tropolone. Construction a bridged semibullvalene-type carbon skeleton". Tetrahedron Letters 29, № 33 (1988): 4123–26. http://dx.doi.org/10.1016/s0040-4039(00)80433-5.

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36

Back, Thomas G. "Design and synthesis of some biologically interesting natural and unnatural products based on organosulfur and selenium chemistry." Canadian Journal of Chemistry 87, no. 12 (2009): 1657–74. http://dx.doi.org/10.1139/v09-133.

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Organosulfur and selenium chemistry has provided fertile ground for the discovery of novel synthetic methodology and for the design of bioactive molecules with potential therapeutic applications. Thus, acetylenic sulfones have been employed in novel strategies for the synthesis of nitrogen heterocycles, including several biologically active alkaloids. The conjugate addition of nitrogen nucleophiles containing ester or chloroalkyl substituents to acetylenic sulfones was followed by base-mediated intramolecular alkylation or acylation to afford variously substituted piperidines, pyrrolizidines,
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37

Antonova, Alexandra S., Marina A. Vinokurova, Pavel A. Kumandin, et al. "Application of New Efficient Hoveyda–Grubbs Catalysts Comprising an N→Ru Coordinate Bond in a Six-Membered Ring for the Synthesis of Natural Product-Like Cyclopenta[b]furo[2,3-c]pyrroles." Molecules 25, no. 22 (2020): 5379. http://dx.doi.org/10.3390/molecules25225379.

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The ring rearrangement metathesis (RRM) of a trans-cis diastereomer mixture of methyl 3-allyl-3a,6-epoxyisoindole-7-carboxylates derived from cheap, accessible and renewable furan-based precursors in the presence of a new class of Hoveyda–Grubbs-type catalysts, comprising an N→Ru coordinate bond in a six-membered ring, results in the difficult-to-obtain natural product-like cyclopenta[b]furo[2,3-c]pyrroles. In this process, only one diastereomer with a trans-arrangement of the 3-allyl fragment relative to the 3a,6-epoxy bridge enters into the rearrangement, while the cis-isomers polymerize alm
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38

Gopinath, S., P. Narayanan, K. Sethusankar, Meganathan Nandakumar, and Arasambattu K. Mohanakrishnan. "Crystal structures and conformations of two Diels–Alder adduct derivatives: 1,8-bis(thiophen-2-yl)-14-oxatetracyclo[6.5.1.02,7.09,13]tetradeca-2(7),3,5-trien-10-one and 1,8-diphenyl-14-oxatetracyclo[6.5.1.02,7.09,13] tetradeca-2,4,6-trien-10-one." Acta Crystallographica Section E Crystallographic Communications 71, no. 2 (2015): 213–16. http://dx.doi.org/10.1107/s2056989015001073.

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The title compounds, C21H16O2S2(I) and C25H20O2(II), are products of a tandem `pincer' Diels–Alder reaction consisting of [2 + 2] cycloadditions between benzo[c]furan and cyclopentanone. Each comprises a fused tetracyclic ring system containing two five-membered rings (inenvelopeconformations with the O atom as the flap) and six-membered rings (inboatconformations). In addition, two thiophene rings in (I) and two phenyl rings in (II) are attached to the tetracyclic ring system. The cyclopentanone ring adopts atwistedconformation in (I) and anenvelopeconformation in (II). In (I), the thiophene
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39

Takahashi, Kohtaro, Naoya Yamada, Daichi Kumagai, et al. "Effect of alkyl substituents: 5,15-bis(trimethylsilylethynyl)- vs. 5,15-bis(triisopropylsilylethynyl)-tetrabenzoporphyrins and their metal complexes." Journal of Porphyrins and Phthalocyanines 19, no. 01-03 (2015): 465–78. http://dx.doi.org/10.1142/s1088424615500388.

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The copper(II), nickel(II), etc. complexes of 5,15-bis(trimethylsilylethynyl)tetrabenzoporphyrin ( TMS - H 2 BP ) and 5,15-bis(triisopropylsilylethynyl)tetrabenzoporphyrin ( TIPS - H 2 BP ) have been prepared from the corresponding bicycle[2.2.2]octadiene(BCOD)-fused precursors by the retro-Diels–Alder reaction. X-ray diffraction (XRD) analyses show that TMS - H 2 BP and its metal complexes of zinc(II) ( TMS - ZnBP ) and copper(II) ( TMS - CuBP ) adopt flat molecular conformations and form herringbone-type packing structures in the single crystalline state. TIPS - H 2 BP and the zinc(II) and c
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40

Bozhenkova, Galina S., Alexandra N. Tarakanovskaya, Oksana D. Tarnovskaya, and Roman V. Ashirov. "INFLUENCE OF ENVIRONMENTAL FACTORS ON PHYSICAL-MECHANICAL PROPERTIES OF POLYDIMETHYL ETHER OF NORBORENE -2;3-DICARBOXYLIC ACID." IZVESTIYA VYSSHIKH UCHEBNYKH ZAVEDENIY KHIMIYA KHIMICHESKAYA TEKHNOLOGIYA 60, no. 5 (2017): 68. http://dx.doi.org/10.6060/tcct.2017605.5511.

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The article is devoted to the production of polymer by metathesis ring-opening polymerization under the influence of ruthenium initiator of type of Hoveyda-Grubbs II generation. The monomer used the mixture of dimethyl ether norbornene-2;3-dicarboxylic acid. The monomer was prepared by the Diels-Alder reaction of dicyclopentadiene and dimethyl maleate. The polymer was prepared in bulk of the monomer mixture. In this paper we have studied the physical and mechanical properties polydimethyl ether of norbornene-2;3-dicarboxylic acid; and assessed the impact of environmental factors on the change
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41

Ota, Koichiro, Kazuo Kamaike, and Hiroaki Miyaoka. "Unified Approach to ent-Eudesmane-type Terpenoid Synthesis: Total Synthesis of Sinupol and Eutyscoparin A." Synthesis, September 13, 2021. http://dx.doi.org/10.1055/a-1643-5729.

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ent-Eudesmane-type terpenoids constitute a large class of natural products derived from plants, animals, and bacteria. We describe a synthetic approach to two ent-eudesmane-type terpenoids, sinupol, and eutyscoparin A, that relies on a key π-facial- and endo/exo-selective intramolecular Diels–Alder reaction to set the C-5–C-10 stereotriads. Further key transformations of trans-fused decalin include conversion to methyl ketone via a versatile thioester intermediate and appropriate functionalization toward target compounds.
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42

WILLIAMS, P. D., and E. LEGOFF. "ChemInform Abstract: OXIDATION OF FURANS. II. USE OF FURANS AND MASKED DIENOPHILES IN THE INTRAMOLECULAR DIELS-ALDER REACTION." Chemischer Informationsdienst 16, no. 30 (1985). http://dx.doi.org/10.1002/chin.198530187.

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43

HERCZEGH, P., M. ZSELY, L. SZILAGYI, and R. BOGNAR. "ChemInform Abstract: Complete Stereoselectivity in the Intramolecular Diels-Alder Reaction of a Triene Derivative (II) from D-Xylose." ChemInform 19, no. 24 (1988). http://dx.doi.org/10.1002/chin.198824170.

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44

TSUGE, O., K. UENO, and S. KANEMASA. "ChemInform Abstract: Sequential Intramolecular Diels-Alder Reaction and Intermolecular 1,3-Dipolar Cycloaddition Reaction: One-Pot [6.6.5]Annelation Reaction Leading to the Formation of Polyaza-Steroid Type Skeletons." Chemischer Informationsdienst 17, no. 40 (1986). http://dx.doi.org/10.1002/chin.198640095.

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45

Shiina, Junichi, Masataka Oikawa, Kensuke Nakamura, Rika Obata, and Shigeru Nishiyama. "ChemInform Abstract: Synthesis of Pinguisane-Type Sesquiterpenoids Acutifolone A (I), Pinguisenol (II), and Bisacutifolones by a Diels—Alder Dimerization Reaction." ChemInform 39, no. 8 (2008). http://dx.doi.org/10.1002/chin.200808183.

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46

TAKAHASHI, K., N. NAMEKATA, Y. FUKAZAWA, K. TAKASE та E. MIKAMI. "ChemInform Abstract: Intramolecular Diels-Alder Reaction with Inverse Electron Demand in 2-(2,3-Diphenylcyclopropen-1-yl)-β-tropolone. Construction of a Bridged Semibullvalene-Type Carbon Skeleton." ChemInform 20, № 7 (1989). http://dx.doi.org/10.1002/chin.198907162.

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47

NOGUCHI, M., S. KAKIMOTO, H. KAWAKAMI, and S. KAJIGAESHI. "ChemInform Abstract: CYCLOADDITION REACTIONS OF 2-PYRONES AND RELATED COMPOUNDS. PART II. REGIOSELECTIVE SYNTHESIS OF SUBSTITUTED PHTHALIDES VIA INTRAMOLECULAR “DIENE-REGENERATIVE” DIELS-ALDER REACTION OF 2-PYRONES." Chemischer Informationsdienst 16, no. 39 (1985). http://dx.doi.org/10.1002/chin.198539187.

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48

Chen, Wang, Zili Feng, Daihua Hu, and Jin Meng. "Design and Synthesis of arylnaphthalene lignan lactones derivatives as Potent Topoisomerase Inhibitors." Medicinal Chemistry 16 (June 10, 2020). http://dx.doi.org/10.2174/1573406416666200610190417.

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Abstract:
Background: Arylnaphthalene lignan lactones are a class of natural products containing the phenyl-naphthyl skeleton. Some arylnaphthalene lignan lactones have been used in clinical as antitumor agents, due to their cytotoxicity and inhibitory activities against DNA topoisomerase I (Topo I) and topoisomerase II (Topo II). Objective: We present the design and synthesis of arylnaphthalene lignan lactones derivatives. The inhibitory activities against Topo I and Topo IIα and antitumor activities of these compounds were assayed. Method: A series of arylnaphthalene lignan lactones derivatives have b
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