反应详情

4-Propionylspiro[cyclohexane-1,1'-indan]-3,5-dione (0.54 g), ethoxyamine hydrochloride (1.3 equiv), anhydrous sodium acetate (1.3 equiv) and absolute ethanol (20 ml) were stirred at room temperature for 3 hr. The mixture was poured into a very dilute aqueous hydrochloric acid solution which was then immediately extracted with diethyl ether. The dried (MgSO4) organic fraction was evaporated to give 4-[1-(ethoxyimino)propyl]spiro[cyclohexane-1,1'indan]-3,5-dione (5) as a pale yellow oil. Pmr spectrum (CDCl3 ; δ in ppm): 1.09-1.41 (6H, 2×t); 2.06 (2H, t); 2.6-3.1 (8H, m); 4.12 (2H, q); 7.2 (4H, m); 14.93 (1H, brs).

1. extractionwas then immediately extracted with diethyl ether
2. dry with materialThe dried (MgSO4) organic fraction
3. customwas evaporated