TCCA-mediated oxidative rearrangement of tetrahydro-β-carbolines: facile access to spirooxindoles and the total synthesis of (±)-coerulescine and (±)-horsfiline
作者:Manda Sathish、Akash P. Sakla、Fabiane M. Nachtigall、Leonardo S. Santos、Nagula Shankaraiah
DOI:10.1039/d1ra02381k
日期:——
Multi-reactive centered reagents are beneficial in chemical synthesis due to their advantage of minimal material utilization and formation of less by-products. Trichloroisocyanuric acid (TCCA), a reagent with three reactive centers, was employed in the synthesis of spirooxindoles through the oxidative rearrangement of various N-protected tetrahydro-β-carbolines. In this protocol, low equivalents of
多反应中心试剂由于其材料利用率最低和副产物形成较少的优点而在化学合成中是有益的。三氯异氰尿酸 (TCCA) 是一种具有三个反应中心的试剂,可通过各种N保护的四氢-β-咔啉的氧化重排来合成螺氧吲哚。在该协议中,需要低当量的 TCCA 才能获得具有广泛底物范围的螺氧吲哚(高达 99% 的产率)。此外,该协议的适用性和稳健性已被证明可用于以优异的产量合成 (±)-coerulescine ( 1 ) 和 (±)-horsfiline ( 2 )等天然生物碱的克级全合成。