Reactions of pyrrolidine enamines of cyclic and acyclic 3,4-dioxobutanoic acid Derivatives with dimethyl acetylenedicarboxylate. A new case of atropoisomerism.
作者:Begoña de Ancos、M.Carmen Maestro、M.Rosano Martín、Ana I. Mateo
DOI:10.1016/s0040-4020(01)85693-3
日期:1994.1
Reaction conditions and structure of the starting enamines (cyclic or open-chain) determine greatly the final products of the title reactions. Whereas in benzene and acetonitrile, DMAD and 1 give a mixture of the diastereoisomeric dienamines 5, in methanol they afford pirrolizine 3. Enaminofuranones 2 and 10 furnish the corresponding ''Michael adducts'' 7a,b,c and 11a,b,c but fail to yield pirrolizines. It has been demonstrated that above b and c adducts differ exclusively on the arrangement of groups around a chiral axis.
Ancos, B. de; Farina, F.; Maestro, M. C., Anales de Quimica, 1995, vol. 91, # 1.2, p. 132 - 141
作者:Ancos, B. de、Farina, F.、Maestro, M. C.、Martin, M. R.
DOI:——
日期:——
Farina, Francisco; Martin, M. Rosario; Martin, M. Victoria, Journal of Chemical Research, Miniprint, 1981, # 7, p. 2547 - 2563
作者:Farina, Francisco、Martin, M. Rosario、Martin, M. Victoria、Sanchez, Felix
DOI:——
日期:——
FARINA F.; MARTIN M. R.; MARTIN M. V.; SANCHES F., REV. REAL. ACAD. CIENC. EXACT., FIS. Y NATUR. MADRID, 1979, 73, NO 4, 599+
作者:FARINA F.、 MARTIN M. R.、 MARTIN M. V.、 SANCHES F.
DOI:——
日期:——
FARINA, F.;MARTIN, M. R.;MARTIN, M. V.;SANCHEZ, F., J. CHEM. RES. MICROFICHE, 1981, N 7, 206-207
作者:FARINA, F.、MARTIN, M. R.、MARTIN, M. V.、SANCHEZ, F.