Description
6-Maleimidocaproic acid contains a maleimide group and a terminal carboxylic acid. The terminal carboxylic acid can react with primary amine groups in the presence of activators (e.g. EDC, or HATU) to form a stable amide bond. The maleimide group will react with a thiol group to form a covalent bond, enabling the connection of biomolecule with a thiol.
Chemical Properties
White to yellow solid, powder, crystals or crystaline powder.
Uses
6-Maleimidohexanoic acid is used as a probe for introducing maleimides groups into biomolecules and active pharmaceutical ingredients. Further, it is used with N-hydroxysuccinimide ester as a bifunctional cross-linking reagent. In addition to this, it acts as a probe for thiol groups in membrane proteins.
Definition
ChEBI: 6-Maleimidocaproic acid is a medium-chain fatty acid. It contains a maleimide group and a terminal carboxylic acid. The terminal carboxylic acid can react with primary amine groups in the presence of activators (e.g. EDC, or HATU) to form a stable amide bond. The maleimide group will react with a thiol group to form a covalent bond, enabling the connection of biomolecule with a thiol.
Application
6-Maleimidocaproic acid is a sulfhydryl reactive heterobifunctional crosslinking reagent. It can be widely used probe for introducing maleimides groups into biomolecules. A probe for thiol groups in proteins. Spacer Arm: 9.4 Angstroms. Probe for thiol groups (SH-groups) in membrane proteins.
Synthesis
Maleic anhydride (29.4 g, 0.3 mol) and 6-aminocaproic acid (39.35 g, 0.3 mol) were refluxed in
glacial acetic acid (900 mL) for 16 h. Acetic anhydride (30.6 g, 0.3 mol) was added dropwise over
a period of 2 hand reflux was continued for 1 h. The acetic acid was removed under vacuum at 70
°C to yield yellow syrup which solidified. The material was chromatographed over silica using
dichloromethane-methanol-acetic acid (100:5:1) affording a crystalline solid (6-Maleimidocaproic acid).
References
[1] Patent: CN107789630, 2018, A. Location in patent: Paragraph 0061; 0062; 0063
[2] Patent: CN108743968, 2018, A. Location in patent: Paragraph 0004; 0005; 0006
[3] Patent: WO2015/95223, 2015, A2. Location in patent: Page/Page column 67
[4] Patent: WO2016/90050, 2016, A1. Location in patent: Page/Page column 61-62
[5] Patent: WO2016/90038, 2016, A1. Location in patent: Page/Page column 123
