4,4-dimetoxi-3-(1-pirrolidinil)-2-butenoato de metilo;(E)-4,4-dimethoxy-3-(pyrrolidin-1-yl)but-2-enoate;methyl (E)-4,4-dimethoxy-3-pyrrolidin-1-ylbut-2-enoate
Farina, Francisco; Fraile, M. Teresa; Martin, M. Rosario, Heterocycles, 1995, vol. 40, # 1, p. 285 - 292
作者:Farina, Francisco、Fraile, M. Teresa、Martin, M. Rosario、Martin, M. Victoria、Guerenu, Ana Martinez de
DOI:——
日期:——
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, Fraile M. Teresa, Martin M. Rosario, Martin M. Victoria+, Heterocycles, 40 (1995) N 1, S 285-292
作者:Farina Francisco, Fraile M. Teresa, Martin M. Rosario, Martin M. Victoria+
DOI:——
日期:——
Ancos, B. De; Delgado, F.; Martin, M. R., Anales de Quimica, 1995, vol. 91, # 5-6, p. 413 - 420