描述了合成吲哚[1,2- c ]喹唑啉(8)和苯并咪唑并[1,2- c ]喹唑啉(9)的合成途径和初步生物学评价。通过适当的二胺(例如2-(2-氨基苯基)吲哚或2-(2-氨基苯基)苯并咪唑)与2-氰基苯并噻唑的缩合获得产物。这项工作进一步证明了微波的普遍适用性,可以轻松快速地获得具有潜在药物价值的原始杂环。
Eco-Friendly Microwave-Assisted Scaleable Synthesis of 2-Cyanobenzothiazoles via<b><i>N</i></b>-Arylimino-1,2,3-dithiazoles
作者:Stéphane Frère、Valérie Thiéry、Thierry Besson
DOI:10.1081/scc-120025190
日期:2003.11
The cyclization procedure of N-aryl iminodithiazoles into 2-cyanobenzothiazoles was re-investigated with the aim to develop original and environmentally friendly procedures. In this article, the benefits associated with the microwave methodology are reported and the opportunity to use solvent-free procedures in order to scale up organic synthesis is studied. The result obtained show that the strong thermal effects due to graphite/microwaves interaction can be efficiently used for the synthesis of heterocyclic molecules for which traditional methods failed or are less attractive.
Novel 6-substituted benzothiazol-2-yl indolo[1,2-c]quinazolines and benzimidazo[1,2-c]quinazolines
The synthetic route to and a preliminary biological evaluation of novel indolo[1,2-c]quinazolines (8) and benzimidazo[1,2-c]quinazolines (9) are described. The products were obtained by condensation of the appropriate diamines (e.g. 2-(2-aminophenyl)indole or 2-(2-aminophenyl)benzimidazole) with 2-cyanobenzothiazoles. This work further demonstrates the general applicability of microwaves for a facile
描述了合成吲哚[1,2- c ]喹唑啉(8)和苯并咪唑并[1,2- c ]喹唑啉(9)的合成途径和初步生物学评价。通过适当的二胺(例如2-(2-氨基苯基)吲哚或2-(2-氨基苯基)苯并咪唑)与2-氰基苯并噻唑的缩合获得产物。这项工作进一步证明了微波的普遍适用性,可以轻松快速地获得具有潜在药物价值的原始杂环。
Synthesis of 2-Cyanobenzothiazoles via Pd-Catalyzed/Cu-Assisted C-H Functionalization/Intramolecular C-S Bond Formation from N-Arylcyanothioformamides
We report herein on a catalytic system involving palladium and copper to achieve the cyclization of N-arylcyanothioformamides and the synthesis of 2-cyanobenzothiazoles. The C-H functionalization/intramolecular C-Sbond formation reaction was achieved in the presence of air, using 2.0 equiv of an inorganic additive (KI). In many cases, the reaction led to a sole product regioselectively obtained in