反应详情

A solution of 1.20 g of the 4-(hydroxymethyl)cyclohexanecarbonitrile obtained in 5 ml of pyridine was treated portionwise with 2.46 g of tosyl chloride at room temperature and while gassing with argon. After stirring at room temperature for 3.5 hours (formation of a white precipitate), the mixture, cooled to 0° C., was treated with about 2 ml of water, cautiously made acid with about 7 ml of concentrated hydrochloric acid and extracted three times with 30 ml of diethyl ether each time. The organic phases were washed with 50 ml of water and 50 ml of saturated sodium chloride solution, dried over magnesium sulphate and concentrated, there remaining behind 2.31 g of a semi-crystalline oil. Low-pressure chromatography (0.5 bar) on 480 g of silica gel using 30% ethyl acetate/petroleum ether as the eluant gave 1.06 (42%) of trans-4-(tosyloxymethyl)cyclohexanecarbonitrile as a colourless, crystallizing oil (m.p. 84°-85° C.) and 1.03 g (41%) of cis-4-(tosyloxymethyl)cyclohexanecarbonitrile as a colourless, viscous oil. Rf values (30% ethyl acetate/petroleum ether): trans product 0.25, cis product 0.20.

1. temperaturecooled to 0° C.
2. extractionextracted three times with 30 ml of diethyl ether each time
3. washThe organic phases were washed with 50 ml of water and 50 ml of saturated sodium chloride solution
4. dry with materialdried over magnesium sulphate
5. concentrationconcentrated