2(OR 3)-Methyl-1-acetoxy-4-alkoxy (or phenoxy)-1,3-butadienes

Details 2(OR 3)-Methyl-1-acetoxy-4-alkoxy (or phenoxy)-1,3-butadienes 2(OR 3)-Methyl-1-acetoxy-4-alkoxy (or phenoxy)-1,3-butadienes

1973-05-25

1977-02-22

Garner, Vivian

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

260488H, 260491, 260494, 260598, 260600R, 260602, C07C 69145

Patent

active

040092020

ABSTRACT:
2(OR 3)-Methyl-1-acetoxy-4-alkoxy(or phenoxy)-1,3-butadienes and a process for their manufacture. The new 2(or 3)-methyl-1-acetoxy-4-alkoxy(or phenoxy)-1,3-butadienes are obtained by heating the corresponding methyl-4-alkoxy(or phenoxy)-crotonaldehyde with an excess of acetic anhydride and an alkali metal acetate, alkali metal carbonate or alkali metal hydroxide or a non-aromatic bicyclic amine or by heating the corresponding methyl-1-acetoxy-4,4-dialkoxy-2-butene in the presence of p-toluenesulfonic acid and quinoline at a temperature of from 150.degree. to 260.degree. C. The new compounds are of very considerable importance as intermediates in the synthesis of carotenoids.

REFERENCES:
patent: 3201456 (1965-08-01), Terry
Chem. Abstracts, 47:1575f.

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