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2005
Carboxylic anhydrides
Q 0470
Mild and Efficient Synthesis of Carboxylic Acid Anhydrides from Carboxylic
and Triazine Coupling Reagents. — Anhydrides of carboxylic acids (II) are
06- 089 Acids
obtained in good yields by treatment of the appropriate carboxylic acids (I) with
2-chloro-4,6-dimethoxy-1,3,5-triazine or 2,4-dichloro-6-methoxy-1,3,5-triazine in the
presence of NMM. The reaction proceeds via triazine active esters, which are able to
acylate carboxylate anions but not less nucleophilic carboxylic acids. —
(KAMINSKI*, Z. J.; KOLESINSKA, B.; MALGORZATA, M.; Synth. Commun. 34
(2004) 18, 3349-3358; Inst. Org. Chem., Tech. Univ., PL-90-924 Lodz, Pol.; Eng.) —
H. Haber
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