Ujaque G,Maseras F,Lledós A.Theoretical characterization of an intermediate for the [3+2] cycloaddition mechanism in the bis(dihydro- xyquinidine)-3,6-pyridazine-osmium tetroxide-catalyzed dihydroxy- lation of styrene. J Org Chem . 1997
B AE CD Dipolarcycloadditionor[3+2]reaction BACED CriegeezwitterionOOODipolarcycloadditionOR1OOR2DipolarcycloreversionR1OO + OR2 R1 R2 O + OR2 Me2SorPPh3insitureduction R1 OO OR2 R1 [3+2]DipolarCycloadditions:GeneralReactionandClassesof1,3-Dipoles B AE CD Dipolarcycloadditionor[3+2]reaction ...
哥伦比亚教授有机化学课件[3+2]Cycloaddition The[3+2]CycloadditionReaction LectureNotes KeyReviews:AsymmetricK.V.Gothelf,K.A.Jorgensen,Chem.Rev.1998,98,863.NitronesP.N.Confalone,Org.React.1988,36,1.AzomethineYlidesI.Coldhaim,R.Hufton,Chem.Rev.2005,105,2765.[3+2]DipolarCycloadditions:AReactionYou...
Provides information on a study of the mechanism of anionic [3 + 2} cycloaddition of allyl anions or allylithium compounds to double or triple bonds in an elegant route both to carbocyclic and to heterocyclic five-membered rings. Methodology used to conduct the study; Results of the study....
Density functional theory calculations have been performed to investigate the nickel-catalyzed[3+2]cycloaddition of cyclopropenones and伪,尾-unsaturated ke... L Liu,H Wu,G Huang - 《Chinese Chemical Letters》 被引量: 0发表: 2021年 Mechanism and selectivity of nickel-catalyzed [3+2] cycloaddition...
亚甲胺叶立德参与的_3_2_环加成反应的最新进展
CuI-catalyzed alkyne-azide cycloaddition provides 1,4-disubstituted 1,2,3-triazoles with such efficiency and scope that the transformation has been describ... VD Bock,H Hiemstra,JH Van Maarseveen - 《European Journal of Organic Chemistry》 被引量: 1792发表: 2010年 ...
35. The STM images in Fig.2b, cshow increased local density of states (LDOS) between molecular units in the chains, in agreement with the formation of covalent bonds between the monomers. The resulting products were predominantly dimers and trimers. The proposed mechanism of the cycloaddition ...
The key step is an asymmetric tandem inter [4 + 2]/intra [3 + 2] cycloaddition between silyoxynitroalkene 17 and chiral vinyl ether (−)-24, illustrating the application of a temporary silicon tether in the tandem nitroalkene cycloaddition process....
(a) Usual symmetric octahedral Ni(II), (b) distorted octahedral Ni(II) complex, which enables acid–base catalysis on the metal centrochirality, (c) normal electron-demand [3+2] cycloaddition and (d) IED cycloaddition. EWG, electron-withdrawing group. ...