Intramolecular cationic cyclization of β-hydroxyalkylphosphine oxides—a route towards the benzophosphorinane core
作者:Katarzyna Włodarczyk、Marek Stankevič
DOI:10.1016/j.tet.2016.06.070
日期:2016.8
Intramolecular cationic cyclization of β-hydroxyalkylphosphine oxides in the presence of an acid lead to the formation of fused bicyclic compounds with an incorporated phosphorus atom. Depending on the structure of the starting compound the formation of either phosphaindane or benzophosphorinane oxides has been observed. The key difference in the reactivity arises from the substitution pattern at the
Synthesis of 1,1,6,6-tetramethylphosphajulolidine †
作者:Peter G. Edwards、Stephen J. Paisey、Robert P. Tooze
DOI:10.1039/b004525j
日期:——
The fused tricyclic dialkyl(phenyl)phosphine, 1,1,6,6-tetramethylphosphajulolidine 11, has been synthesised on a large scale with a view to verifying a computationally derived theory of ligand influence upon the catalytic alkoxycarbonylation of propyne.
β-Hydroxyalkylphosphine oxides undergo an intramolecular electrophilic cyclization reaction in strongly acidic media. The main product in cases where rearrangement of the starting β-carbocation is possible possesses the benzophosphorinane skeleton. To gain insight into the mechanism of this transformation, both experimental methods and DFT calculations have been used. The data show a clear dependence