Process for the preparation of n-heneicosane

Details Process for the preparation of n-heneicosane Process for the preparation of n-heneicosane

2005-06-23

2009-11-10

Dang, Thuan Dinh (Department: 1797)

Chemistry of hydrocarbon compounds

Plural serial diverse syntheses

C585S733000

Reexamination Certificate

active

07615672

ABSTRACT:
A process for the preparation of n-heneicosane is disclosed. The process comprises (a) reacting 2,4-alkaneanedione with 1-bromooctadecane in absolute ethanol in the presence of 18-crown-6 as catalyst to produce 2-heneicosanone; and (b) reducing said 2-heneicosanone using hydrazine hydrate and potassium hydroxide in ethylene glycol to obtain n-heneicosane.

REFERENCES:
patent: 4070410 (1978-01-01), Matishev et al.
Muller, A., et al. “Further X-Ray Measurements on Longchain Compounds (n-Hydrocarbons).” J. Chem. Soc. (1925) pp. 599-600.
Oyamada, T. “Synthesis of 4-hydroxy-3-methoxyphenylethyl heptadecyl and nonadecyl ketones and and of 4-hydroxy-3-methoxystyryl . . .”Database Caplus ′Online! Chem. Abstracts Service and Science Repts. Tohoku Imp. Univ., 1st Ser. 18 (1929) pp. 625-637 XP002356197.

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