Dicationic Intermediates Involving Protonated Amides: Dual Modes of Reactivity Including the Acylation of Arenes
摘要:
In the Bronsted superacid CF3SO3H (triflic acid), amides are able to form reactive, dicationic electrophiles. It is shown that these dicationic intermediates participate in two distinctly different types of electrophilic reactions. The protonated amide increases the reactivity of an adjacent electrophilic group, and the protonated amide group itself shows enhanced reactivity arising from an adjacent cationic charge. In the latter case, several types of amides are even capable of reacting with benzene by Friedel-Crafts acylation.
Dicationic Intermediates Involving Protonated Amides: Dual Modes of Reactivity Including the Acylation of Arenes
摘要:
In the Bronsted superacid CF3SO3H (triflic acid), amides are able to form reactive, dicationic electrophiles. It is shown that these dicationic intermediates participate in two distinctly different types of electrophilic reactions. The protonated amide increases the reactivity of an adjacent electrophilic group, and the protonated amide group itself shows enhanced reactivity arising from an adjacent cationic charge. In the latter case, several types of amides are even capable of reacting with benzene by Friedel-Crafts acylation.
Preparation of Esters and Amides from Carboxylic Acids by Activation with Dialkyl Phosphite-Carbon Tetrachloride Mixture
作者:Zsuzsa M. Jászay、Imre Petneházy、László Tőoke
DOI:10.1080/00397919808004849
日期:1998.8
Abstract A simple one pot phase transfer catalytic method is described for the synthesis of carboxylic amides and esters from carboxylicacids and amines or alcohols, respectively. For the activation of the carboxylicacids “in situ” generated phosphoric acid diester chlorides were applied.
Provided herein are small molecule Epstein-Barr virus-induced G-protein coupled receptor 2 (EBI2) modulator compounds, compositions comprising the compounds, and methods of using the compounds and compositions comprising the compounds. EBI2 is a therapeutic target for the treatment of a variety of diseases or conditions. In some embodiments, EBI2 is a therapeutic target for the treatment of diseases or conditions such as, but not limited to, autoimmune diseases or conditions, cancer, and cardiovascular disease.