烯丙位张力 (也被称为1,3-烯丙位张力) Allylic strain (also known as A1,3 strain, 1,3-allylic strain, or A-strain) in HYPERLINK /wiki/Organic_chemistry \o Organic chemistry organic chemistry is a type of HYPERLINK /wiki/Strain_energy \o Strain energy strain energy resulting from the inte...
1,3-allylic strain as a control element in the Paterno-Buchi reaction of chiral silyl enol...Studies the facial diastereoselectivity in the Paterno-Buchi reaction of chiral silyl enol ethers and benzaldehyde. Influence of steric bulk; Positions of the polar groups; Variations; Combination yields ...
librariesinwhichthepres- enceorabsenceof1,3-allylicstrain(A 1,3 strain) [3] isleveraged toenhanceboth1)scaffolddiversitybyregiodivergentopen- ingofepoxideintermediatesand2)theconformationalspace ofthefinallibrarythroughthesimpleexpedientofchanging thenatureofnitrogensubstitution. [4] Theconceptisillus- trate...
ChemInform Abstract: Allylic 1,3-Strain as a Controlling Factor in Stereoselective Transformations HOFFMANN,W R. - 《Cheminform》 被引量: 0发表: 1990年 C–H Bond Functionalization via Hydride Transfer: Formation of α-Arylated Piperidines and 1,2,3,4-Tetrahydroisoquinolines via Stereoselective ...
Allylic 1,3-Strain as a Controlling Factor in Stereoselective Transformations - HoffmannHoffmann, R. Allylic 1,3-strain as a controlling factor in stereoselective transformations, Chemical Reviews 1989, 89, 1841.R. W. Hoffmann, Allylic 1,3-strain as a controlling factor in stereo- selective ...
doi:10.1002/chin.199248067Reetz, Manfred TKayser, FrankHarms, KlausWILEY‐VCH VerlagCheminformReetz M T,Kayser F,Harms K. Cycioaddition reactions of y-amino α,β-didehydro amino acid esters:A test case for the principle of 1,3-allylic strain[J].Tetrahedron Letters,1992.3453-3456....
Highly Like-Selective [4 + 2] Cycloadditions of Chiral Dienols: The Importance of 1,3-Allylic Strain in the Hydroxy-Directed Stereocontrol W Adam,J Glaeser,K Peters,... - 《Journal of the American Chemical Society》 被引量: 205发表: 1995年 Diastereoselectivity in the Carroll rearrangement ...
Allylic 1,3-strain as a controlling factor in stereoselective transformations The authors show the physical state of an oligotherapic silver preparation and prove its colloidal character and its structural and dimensional characteris... RW Hoffmann - 《Chemical Reviews》 被引量: 2312发表: 1989年 ...
Steric Interference in Allylic and Pseudo-Allylic Systems. I. Two Stereochemical Theorems The constitutions of the hydrogen halide salts of glutaronitrile are shown by NMR analysis, to be 2,2-dihalo-6-amino-2,3,4,5-tetrahydropyridinium halids (VIII). A simple procedure for converting these ...
南开大学 高等有机合成-陈悦Week 1-Thu Chapter1.AlkylationofEnolatesandOtherCarbonNucleophiles Sept.25,2008 EndocyclicEnolate1.Transisslightlymorefavorable 2.OCD3I Me3CMeMe3C OMeMe3C OCD3 83%CD3 17%Me Mechanism EndocyclicEnolate(Cont’d)3.4.5.6.EndocyclicEnolate(Predictionbymolecularmechanics...