To what extent does the substituent conformation influence the kinetics of addition reactions on 5X-bicyclo[4.4.0]decan-2-ones?
作者:Giada Catanoso、Elisabetta Vecchi
DOI:10.1016/s0040-4020(03)00810-x
日期:2003.7
addition reactions on the title compounds have been measured under four different reaction conditions (CH3MgI in Et2O and C6H6, and CH3Li in Et2O at 20°C and −78°C). In strict accordance with previous findings we show that the axial substituents are far less electronegative than their equatorial counterparts in equatorial attack reactions. Axial attack, however, is independent of the substituent conformation
Does substituent's conformation influence the kinetics of reduction reactions on trans-4-X-decal-1-ones and to what extent?
作者:Giorgio Di Maio、Maria Gabriella Mascia、Elisabetta Vecchi
DOI:10.1016/s0040-4020(02)00303-4
日期:2002.4
Stereochemistry and relative rates kax and keq of reduction reactions on title compounds have been measured under five different reaction conditions (NaBH4 in i-PrOH, LiBH4 and NaAlH4 in THF and LiAlH4 in THF and in Et2O). Experiments indicate that axial substituents behave as far less electronegative than their equatorial counterpart in reactions at the equatorial side of molecules.