反应详情

Procedure as described for Amidine I using the following amounts: 6.15 mL of 2,6-dimethylaniline (50.0 mmol); 26.0 mL of 2.0 M butyllithium (52.0 mmol), 8.50 mL of 4-t-butylbenzonitrile (50.0 mmol). After refluxing overnight, the solution was red-orange. Addition of water yielded a yellow solution with suspended solid. Solution was filtered, taken to dryness, resuspended in 100 mL of pentane and stirred vigorously for 1 hour. The resulting white solid was filtered and dried in vacuo yielding 11.19 g of white powder. The filtrate was concentrated to approximately 50 mL and cooled to −10° C. An additional 1.47 g of solid was isolated. Total yield 10.60 g (76%). 1H NMR (400 MHz, CDCl3): 7.87 (d, 2H), 7.50 (d, 2H), 7.04 (d, 2H), 6.90 (t, 1H), 4.56 (s, 2H), 2.15 (s, 6H), 1.36 (s, 9H). 13C {1H} NMR (100 MHz, CDCl3): 154.27, 153.01, 146.97, 133.12, 129.16, 128.53, 126.83, 125.88, 123.05, 35.21, 31.59, 18.17.

1. temperatureAfter refluxing overnight
2. customyielded a yellow solution
3. filtrationSolution was filtered
4. filtrationThe resulting white solid was filtered
5. customdried in vacuo