Pd-NHC catalyzed Suzuki–Miyaura couplings on 3-bromo-9<i>H</i>-pyrido[2,3-<i>b</i>]indole-6-sulfonamide
作者:Sura Mallikarjun Reddy、Bijivemula N. Reddy、Venkata Krishna Reddy Motakatla、Anusha Gokanapalli、Madhvesh Pathak、Peddiahgari Vasu Govardhana Reddy
DOI:10.1080/00397911.2019.1614194
日期:2019.8.18
Abstract A series of novel α-carboline derivatives such as 3-aryl-9H-pyrido[2,3-b]indole-6-sulfonamides have been synthesized from the readily available low-cost raw material, benzotriazole which is subjected to nucleophilic aromatic substitution with 5-bromo-2-chloropyridine followed by sequential steps of cyclization, sulfonation, amidation, and finally Suzuki–Miyaura coupling reactions. The C–C
摘要 以廉价易得的苯并三唑为原料,经亲核芳烃化合成了一系列新型 α-咔啉衍生物,如 3-芳基-9H-吡啶并[2,3-b]吲哚-6-磺酰胺。用 5-溴-2-氯吡啶取代,然后依次进行环化、磺化、酰胺化,最后是 Suzuki-Miyaura 偶联反应。3-溴-9H-吡啶并[2.3-b]吲哚-6-磺酰胺和各种硼酸之间的C-C键形成是通过更易接近的钯预催化剂Pd-PEPPSI-IPr在微波条件下通过铃木偶联实现的反应时间短,产率高。图形概要