Palladium-Catalyzed Oxidative Cycloaddition of Quinazoline-2,4(1H,3H)-diones and Diarylalkynes via C–H/N–H Activation
作者:Alexander V. Stepakov、Darya D. Komolova、Yulia A. Pronina、Stanislav V. Lozovskiy、Stanislav I. Selivanov、Alexander I. Ponyaev、Alexander S. Filatov、Vitali M. Boitsov
DOI:10.1055/a-2105-2850
日期:2023.12
3-subsituted quinazoline-2,4(1H,3H)-diones and alkynes has been developed. The reaction is Pd(II)-catalyzed and successfully occurs in the presence of Ag(I) oxidants. This transformation is assumed to proceed by N–H palladation of the quinazoline-2,4(1H,3H)-dione followed by ortho-C–H activation. Using this methodology, a series of 5,6,7,8-tetraaryl-1H-azepino[3,2,1-ij]quinazoline-1,3(2H)-diones were obtained
已开发出3-取代喹唑啉-2,4(1 H ,3 H )-二酮和炔烃的氧化环加成反应。该反应由 Pd(II) 催化,并在 Ag(I) 氧化剂存在下成功发生。假设这种转化是通过喹唑啉-2,4(1 H ,3 H )-二酮的 N-H 钯化进行的,然后是邻位-C-H 活化。使用该方法,以中等至良好的收率获得了一系列5,6,7,8-四芳基-1H-氮杂[3,2,1- ij ]喹唑啉-1,3(2H ) -二酮。所得三环杂环可通过碱性水解转化为1 H-苯并[ b]azepine-9-甲酰胺衍生物。进行了 DFT 计算以阐明反应机理。