Highly Regioselective Construction of Spirocycles via Phosphine-Catalyzed [3 + 2]-Cycloaddition
, 2016 A direct entry to spirocycles with low to moderate regioselectivity was achieved by triphenylphosphine-catalyzed [3 + 2]-cycloaddition of active exo-methylenecycles (1) and ethyl 2,3-butadienoate (2).
Xiyan Lu (1470865) +2 more
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Roles of Lewis Acid Catalysts in Diels‐Alder Reactions between Cyclopentadiene and Methyl Acrylate
ChemistryOpen, 2020 The Diels‐Alder reaction of cyclopentadiene with methyl acrylate catalyzed by AlCl3 has been theoretically investigated. M06‐2X level DFT calculations have shown that the formation of two C−C bonds is asynchronous in the cycloaddition both in the endo ...
Prof. Ken Sakata +1 more
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[6 + 2] AND [4 + 2] CYCLOADDITION REACTION OF DIPHENYLKETENE AND CYCLOHEPTATRIENE [PDF]
Journal of Sciences, Islamic Republic of Iran, 1993 The cycloaddition reaction of diphenylketene and cycloheptatriene is studied. The reaction proceeds via a highly asynchronous reaction path to the zwitterionic 6 as intermediate. Subsequent CC- bond formation yields 8, 8 diphenylbicyclo [4. 2. I] nona-2,
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Ultrasound-promoted synthesis of novel fused heterocycles by criss-cross cycloaddition
Journal of Saudi Chemical Society, 2016 This work reports a novel and highly efficient methodology for the synthesis of perhydrotriazolotriazoledithions from two successive 1,3-dipolar cycloaddition under ultrasound irradiation.
Javad Safari +2 more
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Synthesis of functionalised sulfonamides [PDF]
, 2008 Sulfonamides are important therapeutic agents and have a diverse array of biological functions in biology and medicine. Their means of synthesis has often involved the use of unstable sulfonyl chloride species; however, recent research has established ...
Mok, B.L.
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Beilstein Journal of Organic Chemistry, 2010 The synthesis of C3-carbocyclic spirooxindoles was realized by way of an intramolecular [2 + 2] cycloaddition reaction between a vinylidene indolin-2-one and an alkyne.
Kay M. Brummond, Joshua M. Osbourn
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Recent advances in the iron-catalyzed cycloaddition reactions
, 2012 The rapid generation of molecular in a relatively easy manner has made the cycloaddition reaction a powerful tool in the synthesis of different membered ring compounds.
Wang ChunXiang, Wan BoShun, 万伯顺
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Asymmetric isothiourea-catalysed formal [3+2] cycloadditions of ammonium enolates with oxaziridines [PDF]
, 2015 The authors thank the Royal Society for a University Research Fellowship (A.D.S.) and the European Research Council under the European Union’s Seventh Framework Programme (FP7/2007—2013), ERC Grant Agreement No. 279850 (C.F.
McLennan, Ross +14 more
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Time-Resolved Mechanism of the Cycloaddition Reaction between Difluorocarbene and Norbornadiene [PDF]
Cycloaddition between difluorocarbene and norbornadiene is a stepwise process where a non-linear cheletropic transition state (TS1) leads to a diradical intermediate, followed by 1,2- and 1,4-addition.
Yuchen, Zhang +2 more
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An ab initio study of the mechanism of the cycloaddition reaction forming bicyclic compounds between vinylidene (H2C=C:) and ethylene [PDF]
Journal of the Serbian Chemical Society, 2011 The mechanism of the cycloaddition reaction forming a bicyclic compounds between singlet vinylidene (H2C=C:) and ethylene was investigated using the CCSD(T)//MP2/6-31G* method. From the potential energy profile, it can be predicted that this reaction has
YONGQING LI, ZHENXIA LIAN, XIUHUI LU
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