Related Experiment Video
Updated: May 22, 2026
![Solid-phase Synthesis of [4.4] Spirocyclic Oximes](/_next/image?url=https%3A%2F%2Fcloudfront.jove.com%2FCDNSource%2Fteasers%2F58508.jpg&w=3840&q=50)
05:15
Solid-phase Synthesis of [4.4] Spirocyclic Oximes
Published on: February 6, 2019
Solution-phase synthesis of a highly substituted furan library
Chul-Hee Cho1, Feng Shi, Dai-Il Jung
1Department of Chemistry, Iowa State University , Ames, Iowa 50011, United States.
ACS Combinatorial Science
|May 23, 2012
Summary
Researchers synthesized diverse furan compounds using iodocyclization and palladium-catalyzed coupling. This method efficiently creates substituted furans, valuable in medicinal chemistry and materials science.
Area of Science:
- Organic Chemistry
- Synthetic Chemistry
- Medicinal Chemistry
Background:
- Furan derivatives are important scaffolds in pharmaceuticals and materials.
- Efficient synthesis of diverse, substituted furans remains a challenge.
Purpose of the Study:
- To develop a versatile method for synthesizing libraries of 2,3,4,5-tetrasubstituted furans.
- To utilize iodocyclization and palladium-catalyzed cross-coupling reactions for furan diversification.
Main Methods:
- Electrophilic iodocyclization of 2-iodo-2-alken-1-ones to form 3-iodofuran intermediates.
- Palladium-catalyzed coupling reactions including Suzuki-Miyaura, Sonogashira, Heck, aminocarbonylation, and carboalkoxylation.
- Library generation through sequential functionalization of 3-iodofurans.
Main Results:
- Good to excellent yields of key 3-iodofuran intermediates were achieved under mild conditions.
- A diverse library of 2,3,4,5-tetrasubstituted furans was successfully synthesized.
- The developed method demonstrates broad applicability for furan synthesis.
Conclusions:
- The combination of iodocyclization and palladium-catalyzed coupling provides an efficient route to diverse furan libraries.
- This synthetic strategy is valuable for generating novel furan compounds for various applications.
- The method offers a flexible platform for further exploration in organic synthesis.
Related Concept Videos
Preparation of 1° Amines: Hofmann and Curtius Rearrangement Overview
In the presence of an aqueous base and a halogen, primary amides can lose the carbonyl (as carbon dioxide) and undergo rearrangement to form primary amines. This reaction, called the Hofmann rearrangement, can produce primary amines (aryl and alkyl) in high yields without contamination by secondary and tertiary amines.
Diazonium Group Substitution with Halogens and Cyanide: Sandmeyer and Schiemann Reactions
Arenediazonium substitution reactions occur when the diazonium group is substituted by various functional groups such as halides, hydroxyl, nitrile, etc. For instance, arenediazonium salts react with copper(I) salts of chloride, bromide, or cyanide to form corresponding aryl chlorides, bromides, and nitriles. These reactions are named Sandmeyer reactions. Although the mechanism of this reaction is complicated, as illustrated in Figure 1, they are believed to progress via an aryl copper...
Electrophilic Aromatic Substitution: Fluorination and Iodination of Benzene
Bromination and chlorination of aromatic rings by electrophilic aromatic substitution reactions are easily achieved, but fluorination and iodination are difficult to achieve. Fluorine is so reactive that its reaction with benzene is difficult to control, resulting in poor yields of monofluoroaromatic products. To address this, Selectfluor reagent is used as a fluorine source in which a fluorine atom is bonded to a positively charged nitrogen.

