作者:Mallinath B. Hadimani、Rajeswari Mukherjee、Ranjan Banerjee、Mai E. Shoman、Omar M. Aly、S. Bruce King
DOI:10.1016/j.tetlet.2015.09.002
日期:2015.10
basic hydrolysis yields the ring expansion product cyclic hydroxamic acids in 12–81% yield. Reactions of substituted cyclopentanones provide ring expanded products where the –NOH group regioselectively inserts to the more substituted position and gives a better yield compared to the treatment of the same ketone with a basic solution of Piloty’s acid. Reaction of phosphines with acyloxy nitroso compounds
用四乙酸铅(IV)处理环戊酮和环丁酮衍生的肟,得到亮蓝色的酰氧基亚硝基化合物,碱性水解后,其扩环产物环状异羟肟酸的产率为12-81%。与用Piloty酸的碱性溶液处理相同的酮相比,取代的环戊酮的反应提供了环扩产物,其中–NOH基团选择性地插入到更取代的位置,并提供了更高的收率。膦与酰氧基亚硝基化合物的反应通常产生扩环的贝克曼重排产物,该产物可水解为相应的内酰胺。迅速水解为HNO的酰氧基亚硝基化合物不显示这种扩环反应性。