Intramolecular Hetero Diels–Alder Routes to γ-Carboline Alkaloids
作者:Scott A Snyder、David A Vosburg、Matthew G Jarvis、J.Hodge Markgraf
DOI:10.1016/s0040-4020(00)00468-3
日期:2000.7
Concise and efficient routes to the carboline alkaloids isocanthine (3), isocanthin-6-one (4), 1-methylisocanthine (5), and 1-methylisocanthin-6-one (6) are reported. In each case, the key synthetic step was an intramolecular hetero Diels–Alder reaction of a 1-aza-1,3-diene with an acetylenic dienophile.