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D Albanese

Publications and source records attributed to D Albanese.

5 recordsLinked to original sources
PubMed2001

Dramatic effect of the metal cation in dealkylation reactions of phosphinic esters promoted by complexes of polyether ligands with metal iodides.

Metal ion electrophilic catalysis has been revealed in dealkylation reactions of phosphinic esters 1-4 promoted by complexes of polyether ligands 5-7 with metal iodides MI(n) (M[n+] = Li(+), Na(+), K(+), Rb(+), Ca(2+), Sr(2+), Ba(2+)) in low polarity solvents (chlorobenzene, 1,2-dichlorobenzene, and toluene) at 60 degrees C. The catalytic effect increases with increasing the Lewis acid character of the cation, in the order Rb(+)< K(+)< Na(+)< Li(+) and Ba(2+)< Sr(2+)< Ca(2+). The results are interpreted in terms of a transition state where the complexed cation (M[n+] subset Lig) assists the departure of the leaving group Ph(2)P(O)O(-) and, at the same time, favors the attack at carbon of the nucleophile I(-) ("push-pull" mechanism). The rate sequence found for 1-4 (Me > Et >> i-Pr and t-Bu) shows that this reaction can be utilized for the selective dealkylation of these substrates.

Journal Article↗
PubMed1992

Creating the "spirit of service".

What does it take for a hospital to achieve excellence in the area of customer service? How can customer service be improved within a large and complex healthcare facility? Many hospitals are currently seeking answers to these questions.

Attitude of Health Personnel↗