By Jacques Mortier
Geared up to allow scholars and artificial chemists to appreciate and extend on fragrant reactions lined in starting place classes, the e-book bargains a radical and obtainable mechanistic clarification of fragrant reactions regarding arene compounds.
• Surveys tools used for getting ready arene compounds and their transformations
• Connects reactivity and method with mechanism
• Helps readers practice fragrant reactions in a realistic context via designing syntheses
• Provides crucial information regarding thoughts used to figure out response mechanisms
Read Online or Download Arene chemistry : reaction mechanisms and methods for aromatic compounds PDF
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Extra resources for Arene chemistry : reaction mechanisms and methods for aromatic compounds
Arene Chemistry: Reaction Mechanisms and Methods for Aromatic Compounds, First Edition. Edited by Jacques Mortier. © 2016 John Wiley & Sons, Inc. Published 2016 by John Wiley & Sons, Inc. N 3 OH 4 ELECTROPHILIC AROMATIC SUBSTITUTION In addition to its application in synthetic chemistry, SEAr has one of the most thoroughly studied mechanisms among organic reactions. These studies have paralleled the development of chemistry itself—from the understanding of ions in chemistry and aromaticity in π‐systems to the development of high‐level theoretical calculations and ultrafast spectroscopic methods.
In SEAr reactions with epoxides, the C─O bond may undergo nucleophilic ring opening following protonation or strong hydrogen bonding at the oxygen. 4) . It is suggested that the epoxide is protonated (or coordinated through hydrogen bonding), leading to a nucleophilic ring opening of the epoxide. 4 An intramolecular SEAr reaction with epoxide 16. There are numerous multistep processes that generate electrophiles. As examples of these types of reactions, we will consider the diazotization of anilines and the formation of chloroiminium ions in the Vilsmeier–Haack reaction.
Have also used low‐ coordinating anion chemistry to prepare several σ‐complexes as protonated arenes , for example, obtaining X‐ray crystal structures of protonated m‐xylene, mesitylene, pentamethylbenzene, and hexamethylbenzene. 22) . The electron‐donating properties of the pyrrolidine nitrogens are clearly apparent by shortening of the C─N bonds to the cyclohexadienyl ring upon formation of the σ‐complex. Another valuable method of studying the σ‐complexes involves the use of superacidic and stable ion conditions pioneered by Olah and colleagues .