and 2-acyloxy 3-oxo 2,3-diphenylpropanamides 13 under anionic activation by cesium fluoride was studied. The fluoride ion is an efficient base for the heterocyclization of 1 into 3 (2H)-furanones and 2 (5H)-furanones, but the hydrolysis of the ester group lowered the selectivity of the reaction. However, the cleavage of 13 into the esters 14 and the cyclization of 3-benzoyloxy 3-methyl 2-butanone into
研究了
氟化铯在阴离子活化下2-酰氧基2-甲基3-氧代丁酰胺1和2-酰氧基3-氧代2,3-二苯基丙酰胺13的演化。
氟离子是将1杂环化为3(2H)-
呋喃酮和2(5H)-
呋喃酮的有效碱,但是酯基团的
水解降低了反应的选择性。然而,将13裂解为酯14和将3-苯甲酰氧基3-甲基2-
丁酮环化为布勒酮是非常选择性的。