1,8-Bis(allylstannyl)naphthalene Derivatives as Neutral Allylation Agents: Rate Acceleration by Chelation-Induced Lewis Acidity
作者:Naoki Asao、Pingli Liu、Keiji Maruoka
DOI:10.1002/anie.199725071
日期:1997.12.1
Protic Solvent-Promoted Neutral Allylation of Aldehydes and Ketones with 1,8-Bis(allylstannyl)naphthalenes
作者:Naoki Asao、Noriko Abe、Zheng Tan、Keiji Maruoka
DOI:10.1055/s-1998-1679
日期:1998.4
The allylation reactions of carbonyl compounds using 1,8-bis(dibutylstannyl)naphthalene 1 (R = Bu) were dramatically promoted by using a mixture of THF and CF3CH2OH (5:1) as solvent. The rate acceleration was due to the enhancement of the Brønsted acidity of CF3CH2OH by the formation of the chelate complex 6 (R = CH2CF3) resulting from the chelation effect of two neighboring tin atoms.