反应详情

1.46 g of the 5-allyl-1,2,5,6-tetrahydro-2,2,6,6-tetramethyl-4-piperidinopyridine thus obtained were dissolved in a mixture of 3 ml of acetic acid, 1.5 g of sodium acetate and 3 ml of water, and the solution was allowed to stand overnight. To the solution were then added 6.0 g of sodium bicarbonate and 3 ml of concentrated aqueous ammonia; the mixture was then extracted with hexane. The extract was dried over anhydrous magnesium sulphate and then treated with charcoal. 0.91 g of the title compound was obtained after removal of the hexane. The compound showed a single spot on thin layer chromatography using a 0.25 mm thick layer of alumina and a mixture of benzene/hexane/ethyl acetate/triethylamine (2 : 2 : 1: 0.5 by volume) as developing solvent; Rf value 0.70.

1. extractionthe mixture was then extracted with hexane
2. dry with materialThe extract was dried over anhydrous magnesium sulphate
3. additiontreated with charcoal