Dibenzyl carbonate (DBzlC) has been used to benzylate phenylacetonitrile, benzyl phenylacetate and phenol. In refluxing N,N-dimethylformamide (DMF) as solvent, and in the presence of K,C03 phenol yielded benzyl phenyl ether and phenylacetonitrile the monobenzylated compound 2,3-diphenylpropionitrile. Likewise, in refluxing N,N-diethylformamide (DEF), benzyl phenyl acetate gave the benzyl 2,3-diphenylpropionate. Selectivity in mono-C-benzyl derivatives was 98-99% at a conversion up to 90%. Such unusually high selectivity is explained in terms of a mechanism involving, initially, carboxybenzylation followed by benzylation, rather than direct benzylation.
Selective mono-benzylation of methylene active compounds with dibenzyl carbonate: benzylation of phenol
SELVA, Maurizio;TUNDO, Pietro
1995-01-01
Abstract
Dibenzyl carbonate (DBzlC) has been used to benzylate phenylacetonitrile, benzyl phenylacetate and phenol. In refluxing N,N-dimethylformamide (DMF) as solvent, and in the presence of K,C03 phenol yielded benzyl phenyl ether and phenylacetonitrile the monobenzylated compound 2,3-diphenylpropionitrile. Likewise, in refluxing N,N-diethylformamide (DEF), benzyl phenyl acetate gave the benzyl 2,3-diphenylpropionate. Selectivity in mono-C-benzyl derivatives was 98-99% at a conversion up to 90%. Such unusually high selectivity is explained in terms of a mechanism involving, initially, carboxybenzylation followed by benzylation, rather than direct benzylation.File | Dimensione | Formato | |
---|---|---|---|
1995 JCS - PT1 NitriliDBnC.pdf
accesso aperto
Tipologia:
Documento in Post-print
Licenza:
Accesso gratuito (solo visione)
Dimensione
668.9 kB
Formato
Adobe PDF
|
668.9 kB | Adobe PDF | Visualizza/Apri |
I documenti in ARCA sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.