Nucleophilic aromatic substitution of heterocycles using a high-temperature and high-pressure flow reactor
作者:Manwika Charaschanya、Andrew R. Bogdan、Ying Wang、Stevan W. Djuric
DOI:10.1016/j.tetlet.2016.01.080
日期:2016.3
nucleophiles. Utilizing the Phoenix Flow Reactor™ in parallel with Design-of-Experiment software enabled rapid optimization of the SNAr protocol. This protocol facilitated efficient synthesis of a broad range of 2-aminoquinazolines, and was extended to 2-aminoquinoxalines and 2-aminobenzimidazoles.
我们在此报告的高温和高压的连续流协议来进行亲核芳香取代(S Ñ与氮亲核试剂的杂环的Ar)。通过将Phoenix Flow Reactor™与实验设计软件并行使用,可以快速优化S N Ar协议。该协议促进了广泛范围的2-氨基喹唑啉的有效合成,并扩展到2-氨基喹喔啉和2-氨基苯并咪唑。
Regioselective N-alkylation with alcohols for the preparation of 2-(N-alkylamino)quinazolines and 2-(N-alkylamino)pyrimidines
In the presence of the [Cp*IrCl2]2/NaOH system, the direct N-alkylation of 2-aminoquinazolines and 2-aminopyrimidines with alcohols afforded the N-exosubstituted 2-(N-alkylamino)quinazolines and 2-(N-alkylamino)pyrimidines with 71–96% yields and complete regioselectivities. The protocol is highly attractive because of easily available starting materials, high atom efficiency and environmental friendliness