Acetaldehyde → Methyl 2-cyclohexyl-3-hydroxypropanoate

To a stirred solution of diisopropylamine (0.85 ml, 6.10 mmol) in 30 ml tetrahydrofuran at -78° under argon was added n-butyllithium (2.5 ml of a 2.5M solution in hexane). After 0.5 hour, methyl cyclohexylacetate (1 ml, 6.10 mmol) was added dropwise in 10 ml tetrahydrofuran. The solution was stirred for 45 minutes, after which was added acetaldehyde (1 ml) in 10 ml tetrahydrofuran. This solution was stirred for two hours at -78°, warmed to room temperature and stirred an additional 12 hours, quenched with water and acidified with 10% hydrochloric acid. The mixture was extracted twice with ethyl ether, and the combined organic portions were then washed once with 10% hydrochloric acid, twice with water, once with saturated sodium chloride solution, dried over magnesium sulfate, filtered and concentrated to give the alcohol as an orange oil (b.p. 85°-92°, 0.5 mm).

1. stirringThis solution was stirred for two hours at -78°
2. stirringstirred an additional 12 hours
3. customquenched with water
4. extractionThe mixture was extracted twice with ethyl ether
5. washthe combined organic portions were then washed once with 10% hydrochloric acid, twice with water, once with saturated sodium chloride solution
6. dry with materialdried over magnesium sulfate
7. filtrationfiltered
8. concentrationconcentrated

ORDレコード

ord-3a329bdbe178466793029bba09718c47

出典データセット

uspto-grants-1992_05

DOI

10.6084/m9.figshare.5104873.v1

特許番号

US05112853