Stereoselective formation of spirolactams by intramolecular ene reaction
作者:J. Cossy、A. Bouzide
DOI:10.1016/s0040-4039(00)92226-3
日期:1992.4
A new and facile access to spirolactams based on the thermal rearrangements of N,N-unsaturated dialkyl-β-ketoamides and N,N-unsaturated dialkyl enaminoamides has been developed.
Thermolysis of N-unsaturated alkyl-β-ketoamides. An easy access to spirolactams
作者:Janine Cossy、Abderrahim Bouzide
DOI:10.1016/s0040-4020(97)00262-7
日期:1997.4
A facile access to spirolactams based on the thermal rearrangement of N,N-unsaturated dialkyl- and of N-unsaturated alkyl-N-alkyl-beta-ketoamides is presented. (C) 1997 Elsevier Science Ltd.
Metallic Salt Promoted Radical Cyclization of β-Keto Carboxamides and Their Corresponding β-Enamino Carboxamides
Substituted lactams and spirolactams were obtained by Mn(III)-induced radical cyclization of unsaturated beta -keto carboxamides. Treatment of the corresponding tertiary enamines under similar reaction conditions and in the presence of K2CO3 afforded the same cyclized products but with inversion of diastereoselectivity. The oxidation of optically pure secondary enamines leads to diastereomeric spirolactams in an approximately 3:1 ratio.
Cossy, Janine; Belotti, Damien; Bouzide, Abderahim, Bulletin de la Societe Chimique de France, 1994, vol. 131, p. 723 - 729