Isomerization of 2-pentenoates to 3-pentenoates

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

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560220, 560221, 562598, C07C 67333

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048748897

ABSTRACT:
3-Pentenoates are prepared by isomerization of 2-pentenoates to 3-pentenoates by a process in which the 2-pentenoate is treaated with from 0.01 to 0.5 mole of cyclic tertiary amine having a pK.sub.a of >6 per mole of 2-pentenoate at from 50.degree. to 250.degree. C. and the 3-pentenoate is distilled off continuously.

REFERENCES:
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patent: 4529815 (1985-07-01), Schneider et al.
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Journal of Organic Chemistry, vol. 47, No. 14, Jul. 2, 1982, American Chemical Society, pp. 2745-2748, J. Hine et al: "Double Bond Stabilizing . . . ".
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Tetrahedron Letters, vol. 25, No. 45, 1984, Pergamon Press Ltd., pp. 5181-5182, Idea et al: A Practical Synthesis . . .
Patent Abstracts of Japan, vol. 6, No. 7 (C-87) (885), Jan. 16, 1982.
Helvetica Chimica Acta, vol. 64, No. 94, 1981, Swiss Chemical Association, pp. 1023-1025, Kreb: A Note on Stereochemical . . .
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Japan Patent Publication 55345/1981.

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