Total Synthesis of the Naturally Occurring <i>Amaryllidaceae</i> Alkaloid (+)‐Zephycitrine
The first catalytic asymmetric total synthesis of the naturally occurring Amaryllidaceae alkaloid, (+)‐zephycitrine ( 1a ), has been accomplished. This efficient 11‐step route (8.3% overall yield) establishes the key stereocenters using an organocatalytic Corey–Itsuno reduction. The construction of the complex core structure, featuring three contiguous stereocenters, was subsequently realized via a Mitsunobu reaction and a microwave‐assisted intramolecular carbonyl‐ene reaction. The synthesis was completed with a final Pictet–Spengler cyclization. This concise approach, employing a sequence of classical and robust reactions, provides a versatile and efficient platform for accessing pro‐drug derivatives and other members of the Amaryllidaceae alkaloid family.
Authors
- Ayan Mondal (ORCID: https://orcid.org/0000-0002-1617-3921)
- T. Roy
- Abhishek Mondal
- Satadru Dutta
- Alakesh Bisai
Institutions
- Indian Institute of Science Education and Research Kolkata (IN)
Publication Details
- Journal
- European Journal of Organic Chemistry
- Published
- 2026-03-04
- DOI
- https://doi.org/10.1002/ejoc.202501205
- Primary Topic
- Chemical synthesis and alkaloids
- Type
- article
- Field-Weighted Citation Impact
- 0.00