1,2-Stereoinduction in acyclic radicals: allylic strain effects
摘要:
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.
1,2-Stereoinduction in acyclic radicals: allylic strain effects
摘要:
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.
Interplay between polar and steric effects on the stereoselectivity of enolate radicals
作者:Carla Hassler、Rohit Batra、Bernd Giese
DOI:10.1016/0040-4039(95)01588-9
日期:1995.10
Ester substituted radicals 4a-c with a bulky tert-butyl substituent at the stereogenic center react with very high stereoselectivity. The polareffects of substitueras X are insignificant.