57734-30-2Relevant academic research and scientific papers
HEXAHYDROINDOLES AND TETRAHYDRO-1H-1-PYRINDINES: ALTERNATIVE FORMATION FROM 5-CARBOXAMIDOPENTANOIC ACIDS AND PROOF OF STRUCTURES
Metz, Gunter
, p. 4101 - 4124 (2007/10/02)
Under mild temperatures the 3-acetyl-3-aryl-5-carboxamidopentanoic acids 1 (Ar=phenyl or dimethoxyphenyl) easily undergo cyclisation in sulfuric acid or polyphosphoric acid (PPA) to the bicyclic lactamlactones 2.Surprisingly different lactams were obtaine
