Ortho-trifluoromethoxylated Anilines
Ortho-trifluoromethoxylated Anilines - Related Videos
08:43
Protocol for the Synthesis of Ortho-trifluoromethoxylated Aniline Derivatives
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2016
An operationally simple procedure for the synthesis of ortho-trifluoromethoxylated aniline derivatives via a two-step sequence of O-trifluoromethylation of N-aryl-N-hydroxyacetamide followed by thermally induced intramolecular OCF3-migration is reported.
01:14
Directing Effect of Substituents: ortho–para-Directing Groups
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2025
Ortho–para directors are substituent groups attached to the benzene ring and direct the addition of an electrophile to the positions ortho or para to the substituent. All electron-donating groups are considered ortho–para directors. They donate electrons to the ring and make the ring more electron-rich. The ring is therefore susceptible to the addition of electrophiles. Substituents such as amino, hydroxy, or alkoxy, containing lone pairs on the atom adjacent to the ring, donate electrons...
01:24
ortho–para-Directing Deactivators: Halogens
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2023
Halogens are ortho–para directors. They are more electronegative than carbon. Therefore, as ring substituents, they can withdraw electrons through the inductive effect and deactivate the aromatic ring towards electrophilic substitution. Halogens also have an electron-donating resonance effect on the ring, which influences the orientation of the incoming electrophile. If an electrophile attacks at the ortho or the para position, the halogen donates electrons and stabilizes the intermediate...
01:11
ortho–para-Directing Activators: –CH3, –OH, –NH2, –OCH3
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2025
All ortho–para directors, excluding halogens, are activating groups. These groups donate electrons to the ring, making the ring carbons electron-rich. Consequently, the reactivity of the aromatic ring towards electrophilic substitution increases. For instance, the nitration of anisole is about 10,000 times faster than the nitration of benzene. The electron-donating effect of the methoxy group in anisole activates the ortho and para positions on the ring and stabilizes the corresponding...
03:35
Rapid Quantification of Oxidized and Reduced Forms of Glutathione Using Ortho -phthalaldehyde in Cultured Mammalian Cells In Vitro
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Cited by 2 •
2024
Quantification of both oxidized and reduced forms of glutathione (GSSG and GSH, respectively) has been achieved through the use of Ortho-phthalaldehyde (OPA). OPA becomes highly fluorescent once conjugated to GSH but is unable to conjugate GSSG until reduced. Here, we describe a multiparametric assay to quantify both using protein quantification for normalization.
FAQs
Its strong electron-withdrawing inductive effect changes the electronic environment around the aromatic ring and amino group. That influence can alter how the compound behaves during synthetic transformations, making the substituent useful when chemists need to adjust reactivity through molecular design. The effect is considered alongside steric and conformational factors rather than in isolation.
Because the two groups occupy adjacent positions on the benzene ring, their proximity can create steric interactions that affect molecular shape. Changes in shape may also influence reactivity during synthesis, so the ortho arrangement provides a structural variable that chemists can use when designing derivatives with particular conformational or reaction-behavior requirements.
Derivative design can adjust electronic, lipophilic, and conformational properties. The electron-withdrawing trifluoromethoxy substituent contributes to electronic tuning, while its presence and ortho placement also affect molecular shape and lipophilic character. Considering these properties together helps chemists explore how structural changes influence the behavior and usefulness of fluorinated molecules.
Ortho placement makes the relationship between substituent effects and molecular geometry especially important. Chemists can use the position to combine the trifluoromethoxy group's inductive influence with steric control near the amino group. This provides a way to design derivatives whose reactivity and conformational properties support a chosen synthetic objective.
A useful design strategy considers the combined effects of the trifluoromethoxy group, the amino group, and their adjacent positions on the ring. Chemists can evaluate how inductive, steric, lipophilic, and conformational features align with the intended derivative. This integrated approach helps guide reaction design instead of optimizing a single molecular property alone.
They provide fluorinated building blocks whose electronic, lipophilic, and conformational properties can be adjusted through derivative design. In medicinal chemistry, that tunability supports the preparation of related molecules for examining how structural changes affect molecular behavior. Such comparisons contribute to broader structure–activity relationship studies during compound development.
Their value in agrochemical research comes from the ability to introduce a trifluoromethoxy-containing aromatic amine framework into fluorinated molecules. Because substitution can influence electronic, lipophilic, and conformational properties, researchers can prepare related derivatives and investigate how those structural variations affect the characteristics relevant to agrochemical design.
They help researchers compare derivatives that differ in electronic, lipophilic, or conformational features while retaining a related aromatic framework. The ortho arrangement is particularly useful because it couples substituent effects with steric changes in molecular shape. Those controlled variations provide a basis for examining relationships between structure and observed molecular activity.