A facile procedure for preparation of carboxylic sulfonic anhydrides under solvent-free conditions
A manipulatively one-pot and rapid method for the synthesis of carboxylic sulfonic anhydride from acid chloride or sulfonyl chloride and potassium salt of carboxylic or sulfonic acid under solvent-free conditions is reported. The reaction has been carried out in excellent yield and short reaction time in the presence of DABCO under solvent-free conditions.
Hajipour,Mazloumi
p. 137 - 141
(2007/10/03)
A facile synthesis of acid anhydrides
A facile synthesis of symmetric and unsymmetric acid anhydrides using phase-transfer catalysis is described. By this method different types of anhydrides can be obtained in high yields under mild conditions even on microscale levels.
Dubey,Kumar, R. Vinod
p. 1 - 3
(2007/10/03)
PREPARATION OF UNSYMMETRICAL CARBOXYLIC ACID ANHYDRIDES FROM MIXED SULFONIC-CARBOXYLIC ANHYDRIDES
-
Urbanski, Jerzy,Manek, Maria Beata
p. 1227 - 1229
(2007/10/02)
Esterification of Carboxylic Acids with Alcohols Using Benzenesulphonyl and Methanesulphonyl Chlorides
The role of benzene- and methane-sulphonyl chlorides as coupling agents in the esterification of carboxylic acids with alcohols has been investigated.Hindered tertiary alcohols require initial conversion of the acid to the mixed acid-anhydride with benzenesulphonyl chloride.It is necessary to adjust molar ratios for esterification with secondary alcohols so that the intermediate formed is the symmetrical acid anhydride, since mixed acid-anhydrides also give the sulphonates of the alcohols wihich are difficult to separate from the esters.
Dharmaratne, H. R. W.,Gunatilaka, A. A. Leslie,Sotheeswaran, S.
p. 39 - 41
(2007/10/02)
More Articles about upstream products of 82251-68-1