反应详情

A solution of 10.0 g (42.0 mmoles) of the product of Example 1 and 25 ml of 1-aminopiperidine in 50 ml of 2-methoxyethyl ether (diglyme) was heated at reflux for 15 hours. The solution as diluted while hot with about 5 ml of water and allowed to cool. The resulting white needles were collected, washed with ethanol, and air-dried to give 8.10 g of 2,10-dihydro-10-(1-piperidinyl)imidazo[2,1-b]quinazolin-5(3H)-one. Melting point 229°-231° C. Total yield 71%.

1. temperatureat reflux for 15 hours
2. temperatureto cool
3. customThe resulting white needles were collected
4. washwashed with ethanol
5. customair-dried