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7-methyl-8-oxononanoic acid synthesis

3synthesis methods
Octanedioic acid, 2-acetyl-2-methyl-, 1,8-diethyl ester

407627-95-6
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7-methyl-8-oxononanoic acid

407627-97-8
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Yield:407627-97-8 90.7%

Reaction Conditions:

with sodium hydroxide in methanol;water at 50; for 12 h;

Steps:

9.9.2 Example 9.2

Example 9.2 (0324) (0325) To the compound of Example 9.1 (13.7 g, 0.0486 mol, 1 eq), sodium hydroxide (6.2 g, 0.170 mol, 3.5 eq), methanol (47.2 mL) and distilled water (15.6 mL) are added. Next, the mixture is subjected to reflux at 50° C. for 12 hours. Then, the solvent is dried under reduced pressure and adjusted to pH 1 by using 1M hydrochloric acid. After that, extraction is carried out by using ethyl acetate and the resultant product is dried under reduced pressure to obtain the target compound (8.17 g, 90.7%) (0326) Rf=0.05 (Silica gel, hexane/ethyl acetate=10:1 v/v)

References:

US2017/313883,2017,A1 Location in patent:Paragraph 0324; 0325; 0326