Direct Sulfenylation of the Purine C8–H Bond with Thiophenols
摘要:
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.
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。
ANTIBODY-DRUG CONJUGATES COMPRISING A CYCLIC DINUCLEOTIDE
申请人:TAKEDA PHARMACEUTICAL COMPANY LIMITED
公开号:US20210106607A1
公开(公告)日:2021-04-15
The present disclosure provides a compound having a STING agonistic activity, which may be expected to be useful as an agent for the prophylaxis or treatment of STING-related diseases.
The present disclosure relates to a compound represented by the formula (I):
wherein each symbol is as defined in the description, or a salt thereof.