81106-50-5Relevant articles and documents
Regioselective bromination of aryl ureas with Phenyliodine(III) diacetate and potassium bromide
Wang, Chun-Meng,Du, Jian-Yao,Zhang, Jin-Yang,Tang, Kai-Xiang,Gao, Tian-Hong,Xu, Yun-Gen,Sun, Li-Ping
, (2019/10/02)
An efficient regioselective and operationally simple urea bromination method utilizing PIDA and potassium bromide is reported. This protocol proved to be effective on a broad range of substituted ureas in acetone at room temperature, forming the p-brominated compounds in 44–86% yields.
Carbonylation of doubly lithiated N′-aryl-N,N-dimethylureas: A novel approach to isatins via intramolecular trapping of acyllithiums
Smith, Keith,El-Hiti, Gamal A.,Hawes, Anthony C.
, p. 2047 - 2052 (2007/10/03)
Lithiation of N′-(2-bromoaryl)-N,N-dimethylureas with methyllithium and tert-butyllithium under nitrogen in anhydrous THF at 0°C gave doubly lithiated arylurea derivatives, which react with carbon monoxide at 0°C to give isatins in good yields. The scope of the reaction has been demonstrated by application to the synthesis of isatin itself and four substituted isatins beating alkyl, chloro or fluoro groups.