Visible-Light Promoted Catalyst-Free Imidation of Arenes and Heteroarenes
作者:Lu Song、Long Zhang、Sanzhong Luo、Jin-Pei Cheng
DOI:10.1002/chem.201404479
日期:2014.10.27
herein a catalyst‐free visible‐light photolytic protocol for the imidation of arenes and heteroarenes. N‐Bromosaccharin was identified as a viable and chemoselective nitrogen radical precursor that undergoes controllable homolytic cleavage under ambient light irradiation. The reaction can be applied to a number of arenes and heteroarenes with good chemo‐ and regioselectivity. Mechanistic studies revealed
In situ Generation and Utilization of CO: An Efficient Route
towards N-Substituted Saccharin via Carbonylative Cyclization of 2-Iodosulfonamides
作者:Bhalchandra Bhanage、Sujit Chavan、Adithyaraj K.
DOI:10.1055/s-0036-1588422
日期:2017.9
The present protocol demonstrates the synthesis of N-substituted saccharines via carbonylative cyclization of 2-iodosulfonamides using a Pd(OAc) 2 /Xantphos catalyst system and phenylformate as a CO source. A variety of saccharin derivatives is synthesized under milder reaction conditions.
本协议演示了使用 Pd(OAc) 2 /Xantphos 催化剂系统和苯甲酸作为 CO 源通过 2-碘磺酰胺的羰基化环化合成 N 取代的糖精。多种糖精衍生物是在较温和的反应条件下合成的。
Decarbonylative CC Bond-Forming Reactions of Saccharins by Nickel Catalysis: Homocoupling and Cycloaddition
作者:Pengbing Mi、Peiqiu Liao、Tao Tu、Xihe Bi
DOI:10.1002/chem.201406227
日期:2015.3.27
Decarbonylation of saccharins by nickelcatalysis enables two kinds of CC bond‐forming reactions; homocoupling of saccharins to form biaryls and cycloaddition with alkynes to form benzosultams. The former represents the first reported nickel‐catalyzed decarbonylativeCChomocouplingreaction, whereas the latter constitutes a powerful method to pharmaceutically relevant benzosultams. The reactions proceed with