Cyclopentanemethanol → 2-Chloro-6-(cyclopentylmethoxy)pyrazine

反応式

[CH:1]1([CH2:6][OH:7])[CH2:5][CH2:4][CH2:3][CH2:2]1.[Cl:8][C:9]1[CH:14]=[N:13][CH:12]=[C:11](Cl)[N:10]=1>O1CCOCC1.ClCCl.CCOCC>[Cl:8][C:9]1[CH:14]=[N:13][CH:12]=[C:11]([O:7][CH2:6][CH:1]2[CH2:5][CH2:4][CH2:3][CH2:2]2)[N:10]=1

参加物

実験手順

K-t-BuO (1.65 g, 14.7 mmol) was added portionwise to a stirred mixture of cyclopentanemethanol (2.99 g, 29.9 mmol) and 2,6-dichloropyrazine (1.90 g, 12.8 mmol) in dioxane (6 mL) at 0° C. (ice-bath). The reaction mixture was then stirred for 2.5 h, while the temperature was allowed to reach room temperature. The reaction mixture was diluted with dichloromethane/ether (1:1), filtered, and concentated in vacuo. The beige liquid was purified by column chromatography on silica gel (18×4 cm) using n-hexane/ethyl acetate (94:6) as eluent. Two chromatographic runs afforded 1.66 g (61%) of the title compound as a colorless oil. HRMS m/z calcd for C10H13ClN2O (M)+212.0716, found 212.0723. Anal. (C10H13ClN2O) C, H, N.