Related Experiment Video
Updated: Jun 1, 2026
11:04
Preparation of Enantiopure Non-Activated Aziridines and Synthesis of Biemamide B, D, and epiallo-Isomuscarine
Published on: June 13, 2022
Concise total synthesis of (-)-8-epigrosheimin
Haishen Yang1, Yuzhe Gao, Xiaoxiao Qiao
1State Key Laboratory of Elemento-organic Chemistry, Nankai University, Tianjin 300071, China.
Organic Letters
|June 17, 2011
Summary
A new four-step synthesis of (-)-8-epigrosheimin was developed using substrate control. Key reactions included stereoselective allylation, translactonization, and ene cyclization for efficient natural product synthesis.
Area of Science:
- Organic Chemistry
- Natural Product Synthesis
Background:
- (-)-8-epigrosheimin is a natural product with potential biological activity.
- Efficient synthetic routes are crucial for accessing complex natural products.
Purpose of the Study:
- To develop a highly efficient and stereocontrolled synthesis of (-)-8-epigrosheimin.
- To explore substrate-controlled reactions for natural product synthesis.
Main Methods:
- Substrate-controlled synthesis
- Stereoselective allylation
- Intramolecular translactonization
- Aldehyde-ene cyclization
Main Results:
- A four-step synthesis of (-)-8-epigrosheimin was achieved.
- High stereo- and regioselectivity were observed in the key allylation step.
- The synthesis demonstrated the utility of substrate-controlled reactions.
Conclusions:
- The developed route provides an efficient access to (-)-8-epigrosheimin.
- This strategy highlights the power of substrate control in complex molecule synthesis.
More Related Videos
Related Concept Videos
02:57Sharpless Epoxidation
The conversion of allylic alcohols into epoxides using the chiral catalyst was discovered by K. Barry Sharpless and is known as Sharpless epoxidation. The use of a chiral catalyst enables the formation of one enantiomer of the product in excess. This chiral catalyst is mainly a chiral complex of titanium tetraisopropoxide and tartrate ester (specific stereoisomer). The stereoisomer used in the chiral catalyst dictates the formation of the enantiomer of the product. In other words, the use of...
01:30Production of Pharmaceuticals
Industrial insulin production uses genetically engineered E. coli expressing a proinsulin gene controlled by a tryptophan promoter and containing a methionine linker for later cleavage. The cells also carry ampicillin resistance for selective growth. Seed cultures are stored at −80 °C and production begins by thawing a small amount to inoculate starter cultures, which are progressively scaled to a 50,000-L bioreactor. In the bioreactor, E. coli grow in nutrient-rich media under sterile, tightly...
03:00Preparation of Epoxides
Overview
Epoxides result from alkene oxidation, which can be achieved by a) air, b) peroxy acids, c) hypochlorous acids, and d) halohydrin cyclization.
Epoxidation with Peroxy Acids
Epoxidation of alkenes via oxidation with peroxy acids involves the conversion of a carbon–carbon double bond to an epoxide using the oxidizing agent meta-chloroperoxybenzoic acid, commonly known as MCPBA. Since the O–O bond of peroxy acids is very weak, the addition of electrophilic oxygen of peroxy acids to...
Epoxides result from alkene oxidation, which can be achieved by a) air, b) peroxy acids, c) hypochlorous acids, and d) halohydrin cyclization.
Epoxidation with Peroxy Acids
Epoxidation of alkenes via oxidation with peroxy acids involves the conversion of a carbon–carbon double bond to an epoxide using the oxidizing agent meta-chloroperoxybenzoic acid, commonly known as MCPBA. Since the O–O bond of peroxy acids is very weak, the addition of electrophilic oxygen of peroxy acids to...