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。
Six- or seven-membered dibenzosultams were synthesized upon treatment of N-aryl- or N-benzyl-2-halobenzenesulfonamides with HCOONa ⋅ 2H2O in DMSO without using additional measures and additives, such as light irradiation, electrochemical apparatus, transition metals, and oxidants. Further functionalization of the free NH group of the resultant dibenzosultams demonstrates the synthetic practicability
在 DMSO 中用 HCOONa·2H 2 O 处理N-芳基-或N-苄基-2-卤代苯磺酰胺后合成了六元或七元二苯磺胺,而无需使用额外的措施和添加剂,例如光照射、电化学装置、过渡金属、和氧化剂。所得二苯并磺胺的游离 NH 基团的进一步官能化证明了该方法的合成实用性。