N-(2-(1 H-吲哚-1-基)苯基)吡啶啉酰胺的钴催化直接CH羰基化反应,用于合成(NH)-吲哚[1,2 - a ]喹喔啉-6(5)H)-骨架已经开发出来。以苯甲酸1,3,5-三甲酸三乙酯(TFBen)作为CO源,并以吡啶甲酸酰胺为无痕导向基团,得到了各种游离的(NH)-吲哚并[1,2 - a ]喹喔啉-6(5 H)-。获得高产(高达88%)。另外,证明了一系列产物衍生化,并且可以通过该方案容易地构建PARP-1抑制剂C的核心片段。
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。
Palladium‐Catalyzed Primary Amine‐Directed Decarboxylative Annulation of
<i>α</i>
‐Oxocarboxylic Acids: Access to Indolo[1,2‐
<i>a</i>
]quinazolines
作者:Guangbin Jiang、Shoucai Wang、Jun Zhang、Jianwen Yu、Ziang Zhang、Fanghua Ji
DOI:10.1002/adsc.201900001
日期:2019.4.16
for the preparation of indolo[1,2‐a]quinazolines via palladium‐catalyzed decarboxylative annulation of indols with α‐oxocarboxylic acids has been realized by using primary amine as a directing group (DG). This transformation proceeds smoothly with exclusive regioselectivity and represents an one‐pot Dominosynthesis of indo‐lo[1,2‐a]quinazolines from α‐oxocarboxylic acids.
用于制备高效的协议吲哚并[1,2一]喹唑啉通过钯-催化的与indols的脱羧环α -oxocarboxylic酸已经通过使用伯胺作为定向基团(DG)实现。这种转化具有排他性区域选择性的顺利进行,代表了从α-氧代羧酸一锅多米诺合成吲哚[1,2- a ]喹唑啉的过程。
Annulation of 1-(2-Aminoaryl)pyrroles, Ethers with Elemental Sulfur To Give 1,3,6-Benzothiadiazepine Derivatives through Double C–S Bond Formation and C–O Cleavage of Ethers
作者:Jie Zhang、Chuwen Song、Linfeng Sheng、Ping Liu、Peipei Sun
DOI:10.1021/acs.joc.8b03187
日期:2019.2.15
An efficient three-component reaction of 1-(2-aminoaryl)pyrroles, ethers, and elemental sulfur for constructing N-heterocycle-fused 1,3,6-benzothiadiazepines under transition-metal-free conditions has been developed. Ethers act as both reactants and solvent in this reaction. The method proceeds efficiently over a broad range of substrates with good functional group tolerance.
PEG-400 as a carbon synthon: highly selective synthesis of quinolines and methylquinolines under metal-free conditions
作者:Chengcheng Ding、Shichen Li、Kaili Feng、Chen Ma
DOI:10.1039/d1gc01617b
日期:——
The remarkable feature of this work was using green, non-toxic PEG-400 as a carbon synthon for highly selective synthesis of quinolines (quinoxalines) and methylquinolines (methylquinoxalines) under metal-free conditions.
Palladium-catalyzed sequential acylation/annulation of indoles with acyl chlorides using primary amine as the directing group
作者:Guangbin Jiang、Guang Yang、Xinqiang Liu、Shoucai Wang、Fanghua Ji
DOI:10.1039/d0nj04406g
日期:——
An attractive and convenient strategy for the direct acylation/annulation of indoles has been developed using Pd(0) as an efficient catalyst. The main feature of this protocol is the use of acyl chlorides as the acylating agents with the primary amine as the directing group. A variety of indolo[1,2-a]quinoxalines were readily obtained in reasonable efficiency and satisfactory yields with good functional
使用Pd(0)作为有效催化剂,已经开发出了一种有吸引力且方便的吲哚直接酰化/环化的策略。该方案的主要特征是使用酰氯作为酰化剂,并以伯胺为导向基团。各种吲哚并[1,2- a ]喹喔啉可以以合理的效率和令人满意的收率获得,并且具有良好的官能团耐受性。在控制实验的基础上,提出了初步的催化机理。