Process for the production of N-acetyl-2,3-dehydro-aminocarboxyl

Organic compounds -- part of the class 532-570 series – Organic compounds – Carboxylic acid esters

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560 41, 560153, 560172, 560155, 562431, 562450, 562575, C07C10204, C07C103127, C07C14923, C07C14931

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044567669

ABSTRACT:
The subject matter of the invention is a process for the production of N-acetyl-2,3-dehydroaminocarboxylic acid esters by reaction of the corresponding 2-azido-carboxylic acid esters with a mixture of one part by volume of acetic anhydride and 1.5 to 5 parts by volume of acetic acid in the presence of rhenium VII sulfide and/or oxide and at a temperature between 50.degree. and 150.degree. C., in a given case, in the simultaneous presence of dry hydrogen chloride.

REFERENCES:
Hilgetag, ed., Preparative Organic Chemistry, John Wiley and Sons, New York, 1972, pp. 1081-1082.
Angew. Chem. Int. Ed. Engl., vol. 21, No. 3, p. 203 (1982); Effenberger et al.
Manis, J. Org. Chem. vol. 45 (1980), pp. 4952-4954.

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