Stereoselective addition of ethyl 3-morpholino(piperidino)-crotonates to 2-trihalomethyl-3-nitro-2H-chromenes. Synthesis of 4-acetonyl-3-nitrochromans
作者:Vladislav Yu. Korotaev、Igor B. Kutyashev、Alexey Yu. Barkov、Vyacheslav Ya. Sosnovskikh
DOI:10.1007/s10593-015-1718-1
日期:2015.5
Tertiary enamines of acetoaceticester, obtained with morpholine and piperidine, add to 2-R1-3-nitro-2Н-chromenes (R1 = CF3, CCl3, Ph) via the vinylogue β-methyl group and give the respective cis,trans-2,3,4-trisubstituted chromans, the stereoconfiguration of which was established by X-ray structural analysis. Acidichydrolysis of these compounds was accompanied by decarboxylation and produced 4-ace
Synthesis of functionalized m-bistrifluoromethylbenzenes via cyclocondensation of 1,1,1,5,5,5-hexafluoroacetylacetone with enamines
作者:Dmitriy M. Volochnyuk、Alexander N. Kostyuk、Dmitriy A. Sibgatulin、Alexander N. Chernega
DOI:10.1016/j.tet.2005.01.075
日期:2005.3
The reaction of 1,1,1,5,5,5-hexafluoroacetylacetone with push-pull enamines having a methyl group at the alpha-position was investigated. It was found that the reaction is sensitive both to the structure of enamines and to reaction conditions. As a result, a set of bistrifluoromethyldialkylanilines and ethyl bistrifluoromethylsalicylate was prepared. Plausible mechanisms and factors influencing the course of the reaction are discussed. (c) 2005 Elsevier Ltd. All rights reserved.
Ohta; Kawasaki, Yakugaku Zasshi/Journal of the Pharmaceutical Society of Japan, 1951, vol. 71, p. 1309,1312
作者:Ohta、Kawasaki
DOI:——
日期:——
A New Annelation Reaction of Cyclic Schiff Bases
作者:A. A. Akhrem、Yu. G. Chernov
DOI:10.1055/s-1980-29293
日期:——
Akhrem, A. A.; Chernov, Yu. G., Doklady Chemistry, 1980, vol. 255, p. 547 - 548