tert-Butyl methyl ether → HCID 178444326, 화합물

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반응 단계

A suspension of 14.8 g of ethyltriphenylphosphonium bromide in 150 ml of t-butyl methyl ether was treated with 4.54 g of solid potassium t-butylate at -10° C. within 5 minutes while gassing with argon in a sulphonation flask provided with a mechanical stirrer. The suspension was stirred at room temperature for 1 hour, then treated dropwise at 0° C. over a period of 5 minutes with a solution of 6.4 g of 3-[trans-4-(p-cyanophenyl)cyclohexyl] propionaldehyde in 40 ml of t-butyl methyl ether and stirred at room temperature for another 15 hours. The reaction mixture was subsequently partitioned three times in diethyl ether/ water. The organic extracts were washed twice with water, dried over magnesium sulphate, filtered and concentrated. In order to separate triphenylphosphine oxide, the residue was dissolved in ethyl acetate and the solution was diluted with petroleum ether, filtered and concentrated. Chromatographic separation of the resulting, yellowish oil (8.55 g) on silica gel with ethyl acetate/petroleum ether (vol. 3:97) gave 5.93 g (89%) of p-[trans-4-(3-pentenyl)cyclohexyl]benzonitrile as white crystals.

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