1,9-Dimetalated ß-carbolines. Versatile building blocks for the total synthesis of Alkaloids
摘要:
Reactions of the dimetalated beta-carboline 6, prepared from 1-bromo-beta-carboline (4), with electrophiles are key steps in the syntheses of various beta-carboline alkaloids. Transmetalation of 6 with ZnCl2 followed by palladium-catalyzed cross coupling reaction with 2-chloxoquinoline gave the alkaloid nitramarine (14).
1,9-Dimetalated ß-carbolines. Versatile building blocks for the total synthesis of Alkaloids
摘要:
Reactions of the dimetalated beta-carboline 6, prepared from 1-bromo-beta-carboline (4), with electrophiles are key steps in the syntheses of various beta-carboline alkaloids. Transmetalation of 6 with ZnCl2 followed by palladium-catalyzed cross coupling reaction with 2-chloxoquinoline gave the alkaloid nitramarine (14).
The structure for the pentacyclic alkaloid maxonine is revised from 1 to 17. Compound 17 was prepared by total synthesis and shown identical to the natural product.
五环生物碱马克斯汀的结构从1修改为17。通过全合成制备化合物17,并显示出与天然产物相同。
1,9-Dimetalated ß-carbolines. Versatile building blocks for the total synthesis of Alkaloids
作者:Franz Bracher、Dirk Hildebrand
DOI:10.1016/s0040-4020(01)89542-9
日期:1994.1
Reactions of the dimetalated beta-carboline 6, prepared from 1-bromo-beta-carboline (4), with electrophiles are key steps in the syntheses of various beta-carboline alkaloids. Transmetalation of 6 with ZnCl2 followed by palladium-catalyzed cross coupling reaction with 2-chloxoquinoline gave the alkaloid nitramarine (14).