Related Experiment Video
Updated: Jan 3, 2026

Synthesis and Bioconjugation of Thiol-Reactive Reagents for the Creation of Site-Selectively Modified Immunoconjugates
Published on: March 6, 2019
Aldehyde-mediated bioconjugation via in situ generated ylides
Sangeeta Parmar1, Sharad P Pawar1, Ramkumar Iyer1
1Department of Chemistry, Indian Institute of Science Education and Research (IISER) Bhopal, Bhauri, Bhopal Bypass Road, Bhopal 462066, Madhya Pradesh, India. dimpy@iiserb.ac.in.
A new bioconjugation method uses Wittig reactions for rapid, site-selective labeling of biomolecules. This simple technique works efficiently in vitro and within cells.
Area of Science:
- Biochemistry
- Organic Chemistry
- Chemical Biology
Background:
- Bioconjugation is crucial for labeling biomolecules in various applications.
- Existing methods can be complex, slow, or lack site-selectivity.
- Developing efficient and selective bioconjugation strategies remains an active research area.
Purpose of the Study:
- To develop a technically simple, rapid, and site-selective bioconjugation method.
- To enable efficient labeling of biomolecules for both in vitro and cellular applications.
Main Methods:
- Generation of maleimido-phosphonium ylides using 4-nitrophenol catalysis.
- Wittig reactions between the generated ylides and aldehyde-appended biomolecules.
- Application of the method under physiological conditions.
Main Results:
- Achieved rapid and high-yielding bioconjugation.
- Demonstrated site-selectivity in the labeling process.
- Successfully applied the method for both in vitro and cellular bioconjugation.
Conclusions:
- The developed method offers a facile and efficient approach for bioconjugation.
- This Wittig reaction-based strategy is suitable for diverse biological labeling applications.
- The technique's simplicity and effectiveness make it valuable for chemical biology research.
Related Concept Videos
Aldehydes and Ketones to Alkenes: Wittig Reaction Overview
Ketones with Nonenolizable Aromatic Aldehydes: Claisen–Schmidt Condensation
As the self-condensation of ketones is generally not favored in basic conditions, the self-condensed products do not form in the reaction between ketones and benzaldehyde. The general reaction of Claisen–Schmidt...
Aldol Condensation vs Claisen Condensation
C–C Bond Formation: Aldol Condensation Overview
Base-Catalyzed Aldol Addition Reaction
α-Hydroxy Ketones via Reductive Coupling of Esters: Acyloin Condensation Overview

