Resolution and racemization of nonbenzenoid atropenantiomers

Efficient Synthesis of Dialkyl (2E)-2-(6H,12H-6,12-Epiminodibenzo[b,f][1,5] Dioxocin-13-yl)but-2-Enedioates via a Pseudo Four-Component Reaction

“…Traditional methods to synthesise 2-aminobutenedioate conjugate derivatives include direct aza-Michael reaction of amines with dialkyl but-2-ynedioates 3,4,[24][25][26][27] and one-pot multi-component reactions. 1,2 Recently, Biehl and co-workers reported the synthesis of 1,5-dioxocin by reaction of 2-hydroxy-1-naphthaldehyde with ammonium acetate.…”