Model studies aimed at the synthesis of Fredericamycin A. A simple o-quinodimethane route to the spiro naphthalene portion
作者:Robert D. Bach、Russell C. Klix
DOI:10.1016/s0040-4039(00)84427-5
日期:1986.1
The three contiguous rings in the naphthalene portion of a model compound related to Fredericamycin A have been prepared by the Diels-Alder cycloaddition reaction of an α-bromo-o-quinodimethane intermediate to the carbon—carbon double bond of the spiro dienophile, spiro[4.4]non-2, 3-ene-1, 4-dione.
Phosphorus pentoxide supported on silica gel (P2O5/SiO2) efficiently acts as a highly active and reusable catalyst for cyclic and non-cyclic S,S-acetalization of a variety of carbonyl compounds under mild, solvent-free and ambient conditions. This method offers significant advantages such as high conversion, clean work-up, short reaction times and simplicity in operation.[GRAPHICS].
Brandsma,L., Recueil des Travaux Chimiques des Pays-Bas, 1970, vol. 89, p. 593 - 604
作者:Brandsma,L.
DOI:——
日期:——
REETZ M. T.; GIANNIS A., SYNTH. COMMUN. 1981, 11, NO 4, 315-322
作者:REETZ M. T.、 GIANNIS A.
DOI:——
日期:——
KUMAR, V.;DEV, S., TETRAHEDRON, 1983, 24, N 12, 1289-1292