Process for synthesizing active esters of carboxylic acids

Details Process for synthesizing active esters of carboxylic acids Process for synthesizing active esters of carboxylic acids

1985-11-22

1988-11-01

Raymond, Richard L.

Organic compounds -- part of the class 532-570 series

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

548475, 548496, 548542, 548344, 560155, 560183, C07D207404, C07D20932, C07D24918, C07D40906

Patent

active

047821647

ABSTRACT:
The invention relates to a new process for preparing active esters or carboxylic acids, which consists in reacting a carboxylic acid, in the presence of an agent for binding hydrohalic acid, with a carbonate of formula: ##STR1## in which R.sup.1 denotes either a radical of formula ##STR2## in which R.sup.3 and R.sup.4, which may be identical or different, are not hydrogen atoms and denote organic radicals which may be substituted or unsubstituted and saturated or unsaturated, and may be or may not be bound to a polymer, and which can be joined together to form a hetero-cyclic system with the nitrogen atom,

REFERENCES:
patent: 3218346 (1965-11-01), Baker etal.
Bodansky-"Principles of Peptide Synthesis", Springer-Verlag, 1984, pp. 28 and 35.
Houben-Weyl-"Methoden der Organischen Chemie", vol. 15, 1974-Index Pages.
Chemical Abstracts, vol. 88, 1978-Abstract No. 105128.
Haslam-"Recent Developments in Methods for the Esterification and Protection of the Carboxyl Group"-Tetrahedron Report No. 93-1980, pp. 2409-2433.

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