A highly efficient approach to indolo [1,2-a]quinoxaline derivatives through a Pd-catalyzed regioselective C–Holefination/cyclization sequence has been developed. This transformation has a wide range of substrates with various functional groups, and the corresponding heterocyclic products were obtained in good yields.
已经开发出了一种高效的方法,可通过Pd催化的区域选择性C–H烯化/环化序列制备吲哚[1,2- a ]喹喔啉衍生物。该转化具有多种具有各种官能团的底物,并且以良好的产率获得了相应的杂环产物。
AuI-Catalyzed Direct Hydroamination/Hydroarylation and Double Hydroamination of Terminal Alkynes
作者:Nitin T. Patil、Pediredla G. V. V. Lakshmi、Vipender Singh
DOI:10.1002/ejoc.201000389
日期:2010.8
An efficient method for formal Markownikoff hydroamination/hydroarylation and doublehydroamination of terminalalkynes has been developed. For example, treatment of terminalalkynes with amino-aromatics or diamines in the presence of 2-5 mol-% of Ph 3 PAuNTf 2 in toluene at 100 °C gave the corresponding products in excellent yields. The method was shown to be applicable to a broad range of substrates
New Route to the Synthesis of the Isocryptolepine Alkaloid and Its Related Skeletons Using a Modified Pictet-Spengler Reaction
作者:Piyush K. Agarwal、Devesh Sawant、Sunil Sharma、Bijoy Kundu
DOI:10.1002/ejoc.200800929
日期:2009.1
A newroute to the synthesis of the isocryptolepine alkaloid with antimalarial activity using a modified Pictet–Spengler reaction has been devised. The strategy was then used to generate libraries based on three structural variants of the alkaloid. Compounds based on these three variants in general were accessed in three steps through a modified Pictet–Spengler cyclization reaction as the key step