INVESTIGADORES
ROMANELLI Gustavo Pablo
artículos
Título:
Solvent-free catalytic preparation of 1,1-diacetates from aldehydes using a Wells-Dawson acid
Autor/es:
GUSTAVO P. ROMANELLI; HORACIO J. THOMAS; GRACIELA T. BARONETTI; JUAN C. AUTINO
Revista:
TETRAHEDRON LETTERS
Editorial:
PERGAMON-ELSEVIER SCIENCE LTD
Referencias:
Lugar: Amsterdam; Año: 2003 vol. 44 p. 1301 - 1303
ISSN:
0040-4039
Resumen:
Abstract?Aromatic and aliphatic aldehydes are transformed in 1,1-diacetates (acylals) in mild conditions, by a treatment with acetic anhydride and a Wells?Dawson acid (H6P2W18O62·24H2O). gem Diacetylation proceeds in Ac2 O with a little as 1% mol Wells?Dawson acid at room temperature and under solventless conditions, obtaining very good to excellent yields (88?98%) of 1,1-diacetates (19 examples). Neither 4-dimethylaminobenzaldehyde nor ketones react under the same conditions.
