作者:Frank D. King、Stephen Caddick
DOI:10.1039/c2ob00012a
日期:——
4-Aryl-azetidin-2-ones (β-lactams) undergo ring opening with triflic acid to give cinnamamides which, in benzene, react further to give 3-aryl-3-phenyl-propionamides. Prolonged reaction times in benzene give 3,3-diphenyl-propionamide via an aryl/phenyl exchange. Lactams of ring size 7 and higher also ring open, but only 7- and 8-membered rings give pure diphenylalkylamides. AlCl3 only ring opens the 4-aryl-azetidinones.
4- 芳基氮杂环丁-2-酮(δ-内酰胺)与三氟甲酸开环生成肉桂酰胺,肉桂酰胺在苯中进一步反应生成 3-芳基-3-苯基丙酰胺。在苯中延长反应时间,通过芳基/苯基交换得到 3,3-二苯基丙酰胺。环径为 7 或更大的内酰胺也能开环,但只有 7 和 8 元环才能生成纯的二苯基烷基酰胺。AlCl3 只能使 4-芳基氮杂环丁酮开环。