Iodine-catalyzed direct C–H thiolation of imidazo[1,5-a]quinolines for the synthesis of 3-sulfenylimidazo[1,5-a]quinolines
作者:Song-Song Wu、Cheng-Tao Feng、Di Hu、Ye-Kai Huang、Zhong Li、Zai-Gang Luo、Shi-Tang Ma
DOI:10.1039/c6ob02736a
日期:——
An iodine-catalyzed regioselective sulfenylation of imidazo[1,5-a]quinolines was developed under metal- and oxidant-free reaction conditions. Using disulfides or thiophenols as sulfenylating agents, 3-sulfenylimidazo[1,5-a]quinoline derivatives were obtained in good to excellent yields with broad functional group tolerance. A multi-component reaction to generate 1-sulfenylated imidazo[1,5-a]pyridines
在无金属和无氧化剂的条件下,开发了碘催化的咪唑并[1,5- a ]喹啉的区域选择性亚磺酰基。使用二硫化物或硫酚作为亚磺酰化剂,可以良好的收率获得优异的3-亚磺酰基咪唑并[1,5- a ]喹啉衍生物,并且具有宽泛的官能团耐受性。还描述了产生1-亚磺酰化的咪唑并[1,5- a ]吡啶的多组分反应。初步生物学评估表明,某些3-亚磺酰化的咪唑并[1,5- a ]喹啉具有显着的抗癌活性。
The synthesis of imidazo[1,5-<i>a</i>]quinolines<i>via</i>a decarboxylative cyclization under metal-free conditions
作者:Zicong Yan、Changfeng Wan、Yu Yang、Zhenggen Zha、Zhiyong Wang
DOI:10.1039/c8ra03786h
日期:——
An iodine-mediated decarboxylative cyclization was developed from α-amino acids and 2-methyl quinolines under metal-free conditions, affording a variety of imidazo[1,5-a]quinolines with moderate to good yields.
Synthesis of Imidazo[1,5-a]quinolines via Metal-Free Oxidative Amination of sp3 C–H Bonds
作者:Chen Ma、Huanhuan Liu、Xinfeng Wang
DOI:10.1055/s-0037-1610137
日期:2018.7
Abstract A novel oxidativeamination of sp3 C–H bonds was developed for the efficient synthesis of imidazo[1,5-a]quinolines from readily available α-amino acids and (2-azaaryl)methanes. This domino protocol, which was established in a TBAI-TBHP oxidation system, includes transition-metal-free decarboxylation and intramolecular cyclization. This method represented a new avenue for the synthesis of N-heterocycles
摘要 开发了一种新型的sp 3 C–H键氧化胺化反应,用于从容易获得的α-氨基酸和(2-氮杂芳基)甲烷高效合成咪唑并[1,5- a ]喹啉。建立在TBAI-TBHP氧化系统中的多米诺协议包括无过渡金属的脱羧和分子内环化。该方法代表了使用2-甲基喹啉作为喹啉-2-甲醛的合成子合成N-杂环的新途径。 开发了一种新型的sp 3 C–H键氧化胺化反应,用于从容易获得的α-氨基酸和(2-氮杂芳基)甲烷高效合成咪唑并[1,5- a ]喹啉。建立在TBAI-TBHP氧化系统中的多米诺协议包括无过渡金属的脱羧和分子内环化。该方法代表了使用2-甲基喹啉作为喹啉-2-甲醛的合成子合成N-杂环的新途径。
Electrocatalytic Intermolecular C(sp<sup>3</sup>)–H/N–H Coupling of Methyl <i>N</i>-Heteroaromatics with Amines and Amino Acids: Access to Imidazo-Fused <i>N</i>-Heterocycles
作者:Peng Qian、Zicong Yan、Zhenghong Zhou、Kangfei Hu、Jiawei Wang、Zhibin Li、Zhenggen Zha、Zhiyong Wang
DOI:10.1021/acs.orglett.8b02578
日期:2018.10.19
An efficient NH4I-mediated intermolecular annulation of methyl N-heteroaromatics with amines/amino acids was developed by virtue of anodic oxidation, providing a variety of functionalized imidazo-fused N-heterocycles with good to excellent yields. The practicality of this protocol was demonstrated by the readily available starting materials, broad substrate scope, water tolerance, scalability, and
Catalyst and additive-free regioselective oxidative C–H thio/selenocyanation of arenes and heteroarenes with elemental sulfur/selenium and TMSCN
作者:Chengtao Feng、Ya Peng、Guangrong Ding、Xiangxiao Li、Chang Cui、Yizhe Yan
DOI:10.1039/c8cc07905f
日期:——
A regioselective oxidative C–H thio/selenocyanation of arenes and heteroarenes with TMSCN and elemental sulfur/selenium was demonstrated under catalyst-free and additive-free conditions. Dimethyl sulfoxide (DMSO) was employed as the mild oxidant as well as the solvent. The reaction is operationally simple and scalable with a broad substrate scope.