ChemInform Abstract: Acyclic 1,2-Induction in Radical Reactions: The Importance of Allylic Strain Effects.doi:10.1002/chin.199204085intermediates (and their reactions)stereochemistry (general, optical resolution)reactions of organo-metal compoundsChemInform is a weekly Abstracting Service, delivering concise ...
Steric interference in allylic and pseudo-allylic systems: A (1,2) strain between methyl group and hydrogen 喜欢 0 阅读量: 27 作者:SK Malhotra,DF Moakley,F Johnson 摘要: No abstract available DOI: 10.1039/c19670000448 被引量: 15 年份: 1967 ...
(1993), ChemInform Abstract: Z-3-Methyl-3-penten-2-ol as Stereochemical Probe for 1,2- versus 1,3 Allylic Strain in the Photooxygenation and Epoxidation of Chiral Allylic Alcohols. ChemInform, 24: no. doi: 10.1002/chin.199324071 Author Information Inst. Org. Chem., Univ., W-8700 ...
ESR Experiments and AM1 calculations of ester substituted radicals show that acyclic radicals 3a,b exist in preferred conformations I and II . The stereoselectivity of the hydrogen abstraction can be explained by the attack anti to the Bu t group of conformers I and II , respectively....
This result is rationalized in terms of the minimization of allylic strain in the course of the reduction, enables the preparation of the carbasugar pseudo-2-deoxy-伪-D-glucopyranose, and suggests that the conformation of the side chain is an important control element in the chemistry of the ...
These results are interpreted in terms of the interactions between singlet oxygen and the allylic hydroxy groups, conformationally promoted by allylic strain which lead either to chemical activation or to physical quenching. The results for substrate9in deuteratedvs.non-deuterated methanol are in accord...
Highly like-selective [4+2] cycloadditions of chiral dienols: The importance of 1,3-allylic strain in the hydroxy-directed stereocontrol. J. Am. Chem. Soc. 1995, 117, 9190-9193; b) Roush, W. R.; Kageyama, M.; Riva, R.; Brown, B. B.; Warmus, J. S.; Moriarty, K. J. ...
LushingtonJustin DouglasAngewandte ChemieCoombs, T. C.; Lushington, G. H.; Douglas, J.; Aube, J. 1,3-Allylic strain as a strategic diversification element for constructing libraries of substituted 2- arylpiperidines. Angew. Chem. Int. Ed. 50, 2734-2737 (2011)....
Allylic strain caused by N-substituents shifts strongly the a,ee, a equilibria in trans-4,6-diphenyl- and cis-4,5-diphenyl-oxazinones, but only moderately the e,ea,a equilibria in the compounds with trans-vicinal phenyl groups. In the latter, the diaxial conformation is p...
The stereoselectivity of hydrogen abstraction by ester-substituted radical 1 [XCH(R 2)C???-(R 1)CO 2R] is explained by allylic strain effects. The ratio of THREO:ERYTHRO products 2:3 depends upon the size of substituents X and R 2.doi...