Die solvoltische Decarboxylierung von ?, ?-unges�ttigeten ?-Halogens�uren Fragmentierungsreaktionen, 9. Miteilung
作者:C. A. Grob、J. Csapilla、G. Cseh
DOI:10.1002/hlca.19640470621
日期:——
Potassium salts of cis and trans α,β-unsaturated β-halo acids undergo decarboxylation when heated in aqueous solution. Salts of the cis series yield acetylene derivatives, whereas those of the trans series afford ketones in addition to acetylene derivatives.
The application of (Z)-3-aryl-3-haloenoic acids to the synthesis of (Z)-5-benzylidene-4-arylpyrrol-2(5H)-ones
作者:John T. Gupton、Nakul Telang、Edith J. Banner、Emily J. Kluball、Kayleigh E. Hall、Kara L. Finzel、Xin Jia、Spencer R. Bates、R. Scott Welden、Benjamin C. Giglio、James E. Eaton、Peter J. Barelli、Lauren T. Firich、John A. Stafford、Matthew B. Coppock、Eric F. Worrall、Rene P.F. Kanters、Kerry Keertikar、Rebecca Osterman
DOI:10.1016/j.tet.2010.09.080
日期:2010.11
Studies directed at the synthesis of (Z)-5-benzylidene-4-arylpyrrol-2(5H)-ones from (Z)-3-aryl-3-haloenoic acids are described The successful strategy relies on the preparation of (Z)-3-aryl-3-haloenoic acids from acetophenones through the corresponding (Z)-3-aryl-3-haloenals and the conversion of the (Z)-3-aryl-3-haloenoic acids to (Z)-5-benzylidene-4-aryl-5H-furan-2-ones The furanones were subsequently treated with primary amines and dehydrated to the corresponding (Z)-5-benzylidene-4-arylpyrrol-2(5H)-one (C) 2010 Elsevier Ltd All rights reserved