作者:Y. Lingam、D. Muralimohan Rao、Dipal R. Bhowmik、Aminul Islam
DOI:10.1080/00397910701575426
日期:2007.11
Abstract The first total synthesis of Bauerine C, a unique indoloquinazoline alkoloid, has been achieved from readily available 2,3‐dichloroaniline. The key step is the Japp–Klingmann condensation between 2,3‐dichloroaniline and ethyl‐2‐acetyl‐5‐phthalimido pentanoate to get 3‐[(2,3‐dichlorophenyl)‐hydrozono]‐pipiridin‐2‐one, which cyclizes to 7,8‐dichloro‐2,3,4,9‐tetrahydro‐β‐carbolin‐1‐one, which
摘要 Bauerine C 是一种独特的吲哚喹唑啉生物碱,其首次全合成由现成的 2,3-二氯苯胺完成。关键步骤是 2,3-二氯苯胺和乙基-2-乙酰-5-邻苯二甲酰亚胺戊酸酯之间的 Japp-Klingmann 缩合反应得到 3-[(2,3-二氯苯基)-hydrozono]-pipiridin-2-one,其环化7,8-二氯-2,3,4,9-四氢-β-咔啉-1-酮,可被硫酸二甲酯甲基化得到7,8-二氯-9-甲基2,3,4,9 -四氢-β-咔啉-1-one。然后将该 N-甲基衍生物与 2,3-二氯-5,6-二氰基-1,4-苯醌 (DDQ) 脱氢,得到目标化合物 Bauerine C。