反应详情

A solution of 5.63 g (33 mmol) of 2,8-dimethylnonan-5-one in 150 ml of methanol was cooled to 0° C. and treated with 0.8 g (21 mmol) of sodium borohydride. After 1 h, the solution was quenched with 1N HCl; diluted with 1:1 hexane/ether; washed sequentially with 1N NaOH, water, and saturated brine; dried over MgSO4 ; and concentrated in vacuo. Flash chromatography using 10% ethyl acetate in hexane gave 2.30 g (40%) of the desired compound (Rf 0.36, 20% ethyl acetate in hexane) as a colorless oil. 1H NMR (CDCl3) δ0.88 (d, J=7 Hz, 6H), 0.89 (d, J=7 Hz, 6H), 1.1-1.6 (m, 10H), 3.56 (m, 1H).

1. customthe solution was quenched with 1N HCl
2. additiondiluted with 1:1 hexane/ether
3. washwashed sequentially with 1N NaOH, water, and saturated brine
4. dry with materialdried over MgSO4
5. concentrationand concentrated in vacuo