cycloaddition reactions involving simple olefins or alkynes are proceeding in diradical mechanism generally,and the others are proceeding in either concerted or zwitterion mechanism. All of which have been elucidated withfrontier molecular orbital interactions.Key words cycloaddition reaction;cumulenes;di...
ChemInform Abstract: A Pd-Catalyzed (2 + 2) Cycloaddition. Mechanism of a Pd-Catalyzed Enyne Metathesis.doi:10.1002/chin.199344087ring closure reactionsfused phenylcycloalkyl derivatives (rings with 347 or more members)ChemInform is a weekly Abstracting Service, delivering concise information at a ...
ChemInform Abstract: MECHANISM OF THERMAL 2+2 CYCLOADDITION REACTIONS BETWEEN ELECTRON‐DONORS AND ELECTRON‐ACCEPTORS, REACTIONS OF HETERONUCLEAR CYCLOADDENDS, C=O GROUPScycloaddition reactionshydrocarbons (acyclic compoundsaldehydes (acyclic compounds
& Bach, T. A chiral thioxanthone as organocatalyst for enantioselective [2+2] photocycloaddition reactions induced by visible light. Angew. Chem. Int. Ed. 53, 4368–4371 (2014). CAS Google Scholar Hölzl-Hobmeier, A. et al. Catalytic deracemization of chiral allenes by sensitized ...
Unexpected mechanism for formal [2 + 2] cycloadditions of metallacyclocumulenes.Unexpected mechanism for formal [2 + 2] cycloadditions of metallacyclocumulenes.CumulenemetallacyclesradialenecomplextransitionmetalsThe formation of radialene complex 6M proceeds through a three-membered metallacyclopropene...
The mechanism of silver(I) and copper(I) catalyzed cycloaddition between 1,2-diazines and siloxy alkynes remains controversial. Here we explore the mechanism of this reaction with density functional theory. Our calculations show that the reaction takes place through a metal (Ag + , Cu +) catal...
过渡金属催化_2_2_2_环加成反应合成吡啶衍生物
The mechanism of the cycloaddition reaction CH 3 M≡MCH 3 (M=C, Si, Ge) with C 2 H 4 has been studied at the CCSD(T)/6-311++G(d,p)//MP2/6-311++G(d,p) level. Vibrational analysis and intrinsic reaction coordinate (IRC), calculated at the same level, have been applied to ...
We investigated the mechanism of the [2 + 2] cycloaddition/cyclopropanation sequence by performing density functional theory calculations on the reaction between 6-chloroquinoline (1a) and 2-chloropropene (2a) (Fig. 3). Energy transfer from the excited photosensitizer to protonated quinoline 1A ...
doi:10.1002/chin.197330145A. PAUL SCHAAPGARY R. FALERWILEY‐VCH Verlag GmbHCheminformA.P. Schaap, G.R. Faler: Mechanism of 1,2 cycloaddition of of singlet oxygen to alkenes. Trapping a peroxide intermediat; J. Am. Chem. Soc., 95, 3381 - 3382, (1973)...