Synthesis applications of cationic aza-Cope rearrangements. Part 25. Total synthesis of Amaryllidaceae alkaloids of the 5,11-methanomorphanthridine type. Efficient total syntheses of (-)-pancracine and (.+-.)-pancracine
摘要:
Stereocontrolled total syntheses of the 5,11-methanomorphanthridine alkaloid pancracine in racemic (rac-1) and natural levorotatory form (1) are described. The key step is a Lewis acid-mediated aza-Cope rearrangement-Mannich cyclization reaction (9 --> 6, Scheme I).
Synthesis applications of cationic aza-Cope rearrangements. Part 25. Total synthesis of Amaryllidaceae alkaloids of the 5,11-methanomorphanthridine type. Efficient total syntheses of (-)-pancracine and (.+-.)-pancracine
摘要:
Stereocontrolled total syntheses of the 5,11-methanomorphanthridine alkaloid pancracine in racemic (rac-1) and natural levorotatory form (1) are described. The key step is a Lewis acid-mediated aza-Cope rearrangement-Mannich cyclization reaction (9 --> 6, Scheme I).
Synthesis applications of cationic aza-Cope rearrangements. Part 25. Total synthesis of Amaryllidaceae alkaloids of the 5,11-methanomorphanthridine type. Efficient total syntheses of (-)-pancracine and (.+-.)-pancracine
作者:Larry E. Overman、Jaechul Shim
DOI:10.1021/jo00069a032
日期:1993.8
Stereocontrolled total syntheses of the 5,11-methanomorphanthridine alkaloid pancracine in racemic (rac-1) and natural levorotatory form (1) are described. The key step is a Lewis acid-mediated aza-Cope rearrangement-Mannich cyclization reaction (9 --> 6, Scheme I).