Potassium Iodide/
<i>tert</i>
‐Butyl Hydroperoxide‐Mediated Oxidative Annulation for the Selective Synthesis of
<i>N</i>
‐Substituted 1,2,3‐Benzotriazine‐4(3
<i>H</i>
)‐ones Using Nitromethane as the Nitrogen Synthon
作者:Yizhe Yan、Bin Niu、Kun Xu、Jianhua Yu、Huanhuan Zhi、Yanqi Liu
DOI:10.1002/adsc.201500619
日期:2016.1.21
A novel and efficient oxidative annulation of 2‐aminobenzamides with nitromethane has been developed for the chemoselective synthesis of N‐substituted 1,2,3‐benzotriazine‐4(3H)‐ones in moderate to excellent yields under transition metal‐free conditions. Two NN bonds were constructed in one pot via CN cleavage of nitromethane, which was selectively employed as the nitrogen synthon. The preliminary
Metal-free oxidative synthesis of quinazolinones via dual amination of sp<sup>3</sup> C–H bonds
作者:Dan Zhao、Teng Wang、Jian-Xin Li
DOI:10.1039/c4cc02648a
日期:——
A novel metal-free synthesis of quinazolinones via dual amination of sp3 C–H bonds was developed. The sp3 carbon in methylarenes or adjacent to a heteroatom in DMSO, DMF or DMA was used as the one carbon synthon.
Furan-2-carbaldehydes as C1 building blocks for the synthesis of quinazolin-4(3<i>H</i>)-ones <i>via</i> ligand-free photocatalytic C–C bond cleavage
作者:Wenjia Yu、Xianwei Zhang、Bingjie Qin、Qiyang Wang、Xuhong Ren、Xinhua He
DOI:10.1039/c8gc00079d
日期:——
efficient green C1 building blocks to synthesize bioactive quinazolin-4(3H)-ones by ligand-free photocatalytic C–C bondcleavage. Notably, protection of hydroxyl, carboxyl, amide, or secondary amino groups is not required. Mechanisticstudies suggest that conjugated N,O-tridentate copper complexes act as novel photoinitiators under visible light.
Metal‐Free, Photoredox‐Catalyzed Synthesis of Quinazolin‐4(3
<i>H</i>
)‐ones and Benzo[4,5]imidazo[1,2‐
<i>c</i>
]quinazolines Using Trialkylamines as Alkyl Synthon
the construction of 2-alkyl substituted quinazolin-4(3H)-ones and benzo[4,5]imidazo[1,2-c]quinazolines using trialkylamines as carbon synthons has been developed. Some of the notable features of this methodology include the synthesis of potent central nervous system depressants (CNS) drug molecules methaqualone (3 la), mecloqualone (3 pa) and gram-scale synthesis.
一种使用三烷基胺作为碳合成子构建 2-烷基取代喹唑啉-4(3 H )-酮和苯并[4,5]咪唑并[1,2-c]喹唑啉的无金属可见光光催化方法发达。该方法的一些显着特征包括强效中枢神经系统抑制剂 (CNS) 药物分子甲喹酮 ( 3 la )、甲氯喹酮 ( 3 pa ) 的合成和克级合成。