作者:Milon Sprecher、Daniel Kost
DOI:10.1021/ja00082a024
日期:1994.2
The scope of the Schmidt rearrangement of ketones has been extended to dialkyl acylphosphonates (11a-111). Surprisingly, it was found that 11a-11dand 11g, in which the acyl moiety was benzoyl alone or benzoyl bearing an electron-attracting or mildly electron-releasing substituent, yielded an overwhelming portion of products resulting from C-to-N migration of the aryl group (N-arylcarbamoylphosphonates
酮的施密特重排的范围已扩展到酰基膦酸二烷基酯 (11a-111)。令人惊讶的是,发现 11a-11d 和 11g,其中酰基部分是单独的苯甲酰基或带有吸电子或轻度放电子取代基的苯甲酰基,产生了绝大多数由芳基的 C 到 N 迁移产生的产物组(N-芳基氨基甲酰基膦酸酯,12 和 N-芳基甲酰胺,15)。相反,带有强大的电子释放对烷氧基的芳烃羰基膦酸酯产生由膦酸酯基团从 C 迁移到 N 或消除的产物(N-芳烃羰基磷酰胺二烷基酯,13 和芳烃甲腈,分别为 17)