C-Alkylation of the acetoacetate anions and of sodium naphthoxide is highly favoured on alumina, while O-alkylation of the acetoacetate anion predominates in tetrahydrofuran in the presence of solidhexamethylphosphorictriamide.
作者:Martyn J. Earle、Paul B. McCormac、Kenneth R. Seddon
DOI:10.1039/a806328a
日期:——
The room temperature ionic liquid 1-butyl-3-methylimidazolium hexafluorophosphate, [bmim][PF6], is used as a ‘green’ recyclable alternative to dipolar aprotic solvents for the regioselective alkylation at the heteroatom of indole and 2-naphthol.
Influence of phase transfer catalyst structure on selectivity
作者:E. V. Dehmlow
DOI:10.1007/bf00696697
日期:1995.11
A concise review is given of systematic studies concerned with the tuning of regio-, ''frequentio-,'' chemo-, and diastereoselectivity by the structure or type of phase transfer catalyst.
Dehmlow Eckehard V., Klauck Robert, J. Chem. Res. Synop, (1994) N 11, S 448-449