反应详情

A solution of potassium tert-butoxide (18.27 ml) in 1:1 (v/v) mixture of dimethoxyethane and ethanol (100 ml) was added slowly to a stirred mixture of 3-quinuclidinone (8.14 g), tosylmethylisocyanate (16.53 g) in dry ethanol (6.5 ml), and dry dimethoxyethane (228 ml) under an atmosphere of argon whilst maintaining the temperature below 10° C. The reaction mixture was allowed to warm to ambient temperature and stirred at this temperature for 30 minutes. The reaction mixture was then stirred at 40° C. for 3 hours. The reaction mixture was cooled, filtered and the filtrate evaporated. The residue was purified by flash column chromatography on alumina (Brockmann Grade I) using a 2:98 (v/v) mixture of methanol/ethyl acetate as eluant to give 3-cyanoquinuclidine (6.6 g), microanalysis, found: C, 67.6; H, 8.5; N, 18.7%; C8H12N2 requires: C, 70.6; H, 8.8; N, 20.6%; NMR (CDCl3): 1.4-1.7 (3H, m), 1.85-2.0 (1H, m) 2.0-2.1 (1H, m) and 2.6-3.4 (7H, m); m/z 137 (M+H).

1. temperaturewhilst maintaining the temperature below 10° C
2. stirringThe reaction mixture was then stirred at 40° C. for 3 hours
3. temperatureThe reaction mixture was cooled
4. filtrationfiltered
5. customthe filtrate evaporated
6. customThe residue was purified by flash column chromatography on alumina (Brockmann Grade I)
7. additiona 2:98 (v/v) mixture of methanol/ethyl acetate as eluant