I2/TBHP promoted isocyanide insertion cyclization reaction for the synthesis of quinazolin fused benzoimidazole as a selective methanol detection probe
An efficient I2/TBHP promoted isocyanide insertioncyclization reaction for the synthesis of quinazolines-fused benzoimidazole was reported. The synthesized compounds have a unique potential to use as a selective solvatochromic fluorescence probe for methanol detection from other solvents, especially EtOH. Introducing a simple one-step method and using a more acceptable iodine molecule instead of expensive
报道了一种有效的 I 2 /TBHP 促进的异氰化物插入环化反应,用于合成喹唑啉类稠合苯并咪唑。合成的化合物具有独特的潜力,可用作选择性溶剂化显色荧光探针,用于检测其他溶剂(尤其是乙醇)中的甲醇。引入简单的一步法并使用更可接受的碘分子代替昂贵的过渡金属催化剂是该策略最重要的优势。
A Consecutive Condensation, Cyclization, and Dehydration for the Synthesis of Benzimidazopyrroloquinazolines Catalyzed by TsOH
作者:Yi-Ping Wang、Xue-Rong Ou、Yue Wang、Jian-Quan Liu、Xiang-Shan Wang
DOI:10.1002/jhet.3293
日期:2018.10
A consecutive condensation, cyclization, and dehydration of 2‐(1H‐benzo[d]imidazol‐2‐yl) anilines and ketonic acid in toluene catalyzed by TsOH gave a series of benzo[4,5]imidazo [1,2‐c]pyrrolo[1,2‐a]quinazolin‐3(2H)‐one derivatives in good to high yields. The structure of 3e was further confirmed unambiguously by X‐ray diffraction analysis.
TsOH催化甲苯中的2-(1 H-苯并[ d ]咪唑-2-基)苯胺和酮酸的连续缩合,环化和脱水反应,得到一系列苯并[4,5]咪唑[1,2- ç ]吡咯并[1,2一]喹唑啉-3(2 ħ) -酮衍生物以良好至高产率。X射线衍射分析进一步明确地证实了3e的结构。
PPTS‐Catalyzed Bicyclization Reaction of 2‐Isocyanobenzaldehydes with Various Amines: Synthesis of Diverse Fused Quinazolines
A PPTS (pyridinium p‐toluenesulfonate)‐catalyzed bicyclization reaction of 2‐isocyanobenzaldehydes as 1,5‐dielectrophiles with various amines has been developed. The reaction not only provides a simple and efficient strategy for the assembly of structurally diverse fused quinazoline derivatives from readily available substrates under metal‐free and mild conditions in a single step with only water and
Synthesis of benzoimidazoquinazolines by cobalt-catalyzed isocyanide insertion–cyclization
作者:Fereshteh Ahmadi、Ayoob Bazgir
DOI:10.1039/c6ra06828f
日期:——
An efficient and practical protocol for the synthesis of benzoimidazoquinazoline amines in moderate to good yields by the reaction of isocyanides and benzo[d]imidazol-anilines via a cobalt-catalyzed isocyanide insertion cyclization reaction...
Dimethyl Sulfoxide Involved One-Pot Synthesis of Quinoxaline Derivatives
作者:Caixia Xie、Zeyuan Zhang、Danyang Li、Jian Gong、Xushuang Han、Xuan Liu、Chen Ma
DOI:10.1021/acs.joc.6b02977
日期:2017.4.7
An efficient, green, and novel method for the synthesis of N-heterocycle-fused quinoxalines is reported herein. Dimethyl sulfoxide was used as both a reactant and a solvent in this reaction. A wide range of products in moderate to excellent yields were obtained, including pyrrolo[1,2-a]quinoxalines, indolo[1,2-a]quinoxalines, 1H-pyrrolo[3,2-c]quinolines, and benzo[4,5]imidazo[1,2-c]quinazolines.
本文报道了合成N-杂环融合的喹喔啉的有效,绿色和新颖的方法。在该反应中,二甲基亚砜既用作反应物又用作溶剂。获得了各种中等至优异收率的产品,包括吡咯并[1,2- a ]喹喔啉,吲哚并[1,2- a ]喹喔啉,1 H-吡咯并[3,2- c ]喹啉和苯并[ 4,5]咪唑并[1,2- c ]喹唑啉。