A novel protocol for nickel-catalyzed direct sp(2) C-H bond arylation of purines has been developed. This new reaction proceeded efficiently at roomtemperature using Grignard reagent as the coupling partner within 5 hours in good to high yields. This approach provides a new access to a variety of C8-arylpurines which are potentially of great importance in medicinal chemistry.
One-Step Visible Light Photoredox-Catalyzed Purine C8 Alkoxylation with Alcohol
作者:Zhe Luo、Changtong Lu、Gary Histand、Dongen Lin
DOI:10.1021/acs.joc.2c01146
日期:2022.9.2
A cross-dehydrogenation coupling reaction between purines and alcohols, induced by visible light, using an acridinium photocatalyst and air as the sole oxidant, to synthesize a series of C8-alkoxy purine derivatives was developed. This protocol is a green and novel method to construct the C8–O bond on a purine ring with high step and atom economy.
以吖啶鎓光催化剂和空气为唯一氧化剂,在可见光诱导下,嘌呤与醇发生交叉脱氢偶联反应,合成了一系列C8-烷氧基嘌呤衍生物。该协议是一种在嘌呤环上构建 C 8 -O 键的绿色新颖方法,具有高步骤和原子经济性。
Visible light-induced direct alkylation of the purine C<sub>8</sub>–H bond with ethers
作者:Changtong Lu、Gary Histand、Dongen Lin
DOI:10.1039/d3ob00147d
日期:——
purine derivatives by ethers was developed using Eosin Y as the photocatalyst and t-BuOOH as the oxidant at roomtemperature. This method describes the coupling of the α-C of the ether to the C8 of purine. Of particular interest is that substrates include purines with various functional groups and even unprotected 9H-purines. The protocol provides an effective method for the synthesis of 8-alkylpurine derivatives
以曙红Y为光催化剂, t -BuOOH为氧化剂,室温下开发了一步可见光诱导的嘌呤衍生物C 8 -H键直接烷基化反应。该方法描述了醚的 α-C 与嘌呤的 C 8的偶联。特别令人感兴趣的是底物包括具有各种官能团的嘌呤,甚至是未保护的 9 H-嘌呤。该协议为合成具有高原子经济性和高区域选择性的 8-烷基嘌呤衍生物提供了一种有效的方法。
CYCLIC DI-NUCLEOTIDES COMPOUNDS FOR THE TREATMENT OF CANCER
申请人:Eisai R&D Management Co., Ltd.
公开号:EP4008403A1
公开(公告)日:2022-06-08
Provided herein are compounds useful for the treatment of cancer.
本文提供的化合物可用于治疗癌症。
Direct Sulfenylation of the Purine C<sub>8</sub>–H Bond with Thiophenols
作者:Wei Jiang、Juanping Zhuge、Jianxiao Li、Gary Histand、Dongen Lin
DOI:10.1021/acs.joc.9b03115
日期:2020.2.21
The one-step copper-mediated regioselective formation of the C-8-S bond for purine derivatives with arylthiols was achieved using air as the green oxidant in the presence of 1.0 equiv of Na2CO3 and stoichiometric CuCl and 1,10-phenanthroline monohydrate. This method provides an economical, easy-to-handle, and effective method for the synthesis of 8-sulfenylpurine derivatives in moderate to excellent yields. The reaction is selective for C8 over C2 and C6. It also tolerates a free amine on the purine, and it has a wide substrate scope.