ChalconeTFAAα,β-unsaturated carboxylic acid areneA number of 卤,-unsaturated carboxylic acids were reacted with electron rich arenes or heteroarene in the presence of trifluoroacetic anhydride (TFAA) and H3PO4 at room temperature to give a variety of chalcone derivatives in good to ...
REACTION MECHANISMS O3.1 O3.2 O3.3 O3.4 O3.5 O3.6 O3.7 O3.8 O3.9 O3.10 O3.11 Acids and Bases Carbanion Attack at a Carbonyl Group The Mechanism of Reduction Reactions Nucleophilic Attack by Water Nucleophilic Attack by an Alcohol Addition/Elimination Reactions of Carboxylic Acid Derivatives Free...
In the production of carboxylic acid or carboxylic acid ester, a reaction product containing the carboxylic acid or carboxylic acid ester which has been produced by the reaction of an olefin, carbon monoxide, and water or an alcohol in the presence of HF
Last time in this walkthrough on elimination reactions, we talked abouttwo types of elimination reactions.In this post, we’re going to dig a little bit deeper on one type of elimination reaction, and based on what experiments tell us, come up with a hypothesis for how it works. Table of...
multicomponentcondensationofaldehydes,2-naphtholand amideorureainthepresenceofLewisorBrønstedacid catalystssuchaschlorosulfonicacid[7],p-toluenesulfonic acid[8],NaHSO4�H2O[9],Fe(HSO4)3[10],Sr(OTf)2[11], iodine[12],heteropolyacidK5CoW12O40�3H2O[13]and heterogeneouscatalystslikecation-exchange...
of phosphorous acid diesters (I) is by reacting either H3PO4 or a phosphorous acid monoester R2OPH(O)OH (II) with a carboxylic acid anhydride (III) and an alcohol R2OH (IV) at 20-50 deg. C, with the H2PO4 or (II) being first mixed with (III) and (IV) then added, the ...
of phosphorous acid diesters (I) is by reacting either H3PO4 or a phosphorous acid monoester R2OPH(O)OH (II) with a carboxylic acid anhydride (III) and an alcohol R2OH (IV) at 20-50 deg. C, with the H2PO4 or (II) being first mixed with (III) and (IV) then added, the ...
with sufficient aqueous alkali, e.g. NaOH, KOH, Na2CO3 or K2CO3, t neutralize 70-95% of the acid groups in the rosin.ALSO:Reaction products are formed by reaction between terpene polymers and a ,b -unsaturated mono- or polybasic carboxylic acids or derivatives thereof. The polymer and ...
in the presence of a non-nucleophilic solvent (e.g. acetone). The (II):(I) molar ratio is pref. 1:1. (II) is suitably "Chloramine T". The acid is pref. H2SO4, H3PO4 or a sulphonic acid and is used in an amt. of 1 mole per mole of (II). The process is highly ...
in the presence of a non-nucleophilic solvent (e.g. acetone). The (II):(I) molar ratio is pref. 1:1. (II) is suitably "Chloramine T". The acid is pref. H2SO4, H3PO4 or a sulphonic acid and is used in an amt. of 1 mole per mole of (II). The process is highly ...