Photocyclization of enamides. XXXIII. Total syntheses of (.+-.)-agroclavines, (.+-.)-fumigaclavine B, and (.+-.)-lysergene.
作者:Ichiya NINOMIYA、Toshiko KIGUCHI、Chiyomi HASHIMOTO、Takeaki NAITO
DOI:10.1248/cpb.39.23
日期:——
Total syntheses of several ergoline-type alkaloids, (±)-agroclavine (21), (±)-agroclavine I (24), (±)-fumigaclavine B (28), and (±)-lysergene (33), were accomplished via a route involving reductive photoxyclization of the enamide 5 followed by oxidative cleavage of the dihydrofuran ring.
通过烯酰胺 5 的还原性光环化以及二氢呋喃环的氧化裂解路线,完成了几种麦角林型生物碱的全合成,包括 (±)-agroclavine (21)、(±)-agroclavine I (24)、(±)-fumigaclavine B (28) 和 (±)-lysergene (33)。