Bellassoued-Fargeau, Marie-Claude; Graffe, Bernadette; Sacquet, Marie-Claude, Journal of Heterocyclic Chemistry, 1985, vol. 22, p. 713 - 718
作者:Bellassoued-Fargeau, Marie-Claude、Graffe, Bernadette、Sacquet, Marie-Claude、Maitte, P.
DOI:——
日期:——
Transformations of 4-oxo-4H-chromene-3-carbaldehyde under the action of Fe(CO)5
作者:A. A. Ambartsumyan、T. T. Vasil’eva、O. V. Chakhovskaya、N. E. Mysova、V. A. Tuskaev、V. N. Khrustalev、K. A. Kochetkov
DOI:10.1134/s1070428012030207
日期:2012.3
Transformations of 4-oxo-4H-chromene-3-carbaldehyde in the presence of pentacarbonyliron and HMPA in benzene and toluene were studied, and their probable mechanism was proposed. The structure of 3-(4-oxochroman-3-ylmethyl)-4H-chromen-4-one was determined by spectral methods and X-ray analysis.
Halogen-Exchange Fluorination of β-Chlorovinyl Aldehydes - Unexpected Cascade Transformations in the Fluorination of 4-Chloro-2<i>H</i>
-chromene and 4-Chloro-2<i>H</i>
-thiochromene-3-carbaldehydes
One of the most facile and robust ways of incorporating fluorine atoms in organic substrates is through the Halex fluorination. We have described here the Halex fluorination of β‐chlorovinyl aldehydes using KF/DMSO system under mild conditions. Further the transformation of the fluoro‐substituted intermediates to its dimeric compounds via a cascade sequence of six steps is discussed.