An efficient metal‐free, (NH4)2S2O8 mediated intramolecularoxidativecyclization for the construction of fused polycyclic quinazolinone derivatives under mild conditions was disclosed. This method provides an efficient and facile approach to the synthesis of polycyclic quinazolinone derivatives (> 40 examples), as well as the natural products tryptanthrin, rutaecarpine, and their analogues.
公开了在温和条件下用于构建稠合多环喹唑啉酮衍生物的高效无金属,(NH 4)2 S 2 O 8介导的分子内氧化环化反应。该方法为合成多环喹唑啉酮衍生物(> 40个实例)以及天然产物色胺酮,芸苔芸香碱及其类似物提供了一种高效简便的方法。
A Boron-Nitrogen Double Transborylation Strategy for Borane-Catalyzed Hydroboration of Nitriles
Organoborane-catalyzed hydroboration of nitriles provides N,N-diborylamines, which act as efficient synthons for the synthesis of primary amines and secondaryamides. Known nitrile hydroboration methods are dominated by metal catalysis. Simple and metal-free hydroboration of nitriles using diborane [H-B-9-BBN]2 as a catalyst and pinacolborane as a turnover reagent is reported. The reaction of monomeric
Amidation of Aldehydes and Alcohols through α-Iminonitriles and a Sequential Oxidative Three-Component Strecker Reaction/Thio-Michael Addition/Alumina-Promoted Hydrolysis Process to Access β-Mercaptoamides from Aldehydes, Amines, and Thiols
hydrolysis conditions for converting α‐iminonitriles into carboxamides have been developed. In combination with the oxidative three‐component Strecker reaction, the one‐pot direct amidation of aldehydes and alcohols is reported. Subsequently, an Yb(OTf)3‐catalyzed Michael addition of thiols to α,β‐unsaturated α‐iminonitriles is reported for the synthesis of β‐mercapto‐α‐iminonitriles. The successful integration
A visible-light-induced/thiourea-mediated intramolecularcyclization of o-nitroarenes under mild conditions is realized for the first time, which provides an efficient and environmentally friendly way to access pharmaceutical relevant quinazolinone derivatives. The reaction can be easily extended to gram level by using a continuous-flow setup with high efficiency. Mechanistic investigation including