molecular switch may be responsible for the observed differences in 5-HT6R activity of the studied chemotypes with different amine-like fragments. Considering the multiple functionalization sites of the embedded guanidine fragment, diverse libraries were constructed, and the relationshipsbetween the structure and activity, metabolic stability, and solubility were established. Compounds from the N
Electron Transfer Photoredox Catalysis: Development of a Photoactivated Reductive Desulfonylation of an Aza‐Heteroaromatic Ring
作者:Qiang‐Liu、Yu‐Xiu Liu、Hong‐Jian Song、Qing‐Min Wang
DOI:10.1002/adsc.202000578
日期:2020.8.4
protocol for desulfonylation of aza‐heteroaromatic rings via photoinduced electrontransfer and hydrogen atom transfer. This general protocol has a wide substrate range and moderate to good yields. The utility of the method was demonstrated by the chemoselective desulfonylation of a molecule containing both an aliphatic and an aromatic sulfonamide.
Visible‐Light‐Promoted Radical Cyclization and N−N Bond Cleavage Relay of N‐Aminopyridinium Ylides for Access to 2,3‐Difunctionalized Indoles
作者:Meng‐Meng Xu、Wen‐Bin Cao、Xiao‐Ping Xu、Shun‐Jun Ji
DOI:10.1002/adsc.202200248
日期:2022.7.5
accurate difunctionalization reaction undergoes a tandem process involving a radical-mediated 1,3-dipolar cycloaddtion which generated from the single-electron oxidation of N-aminopyridinium ylides, a cleavage of the N−N bond as well as an oxidation of indoline ring. The electrophilic pyridyl and nucleophilic amino groups can be installed simultaneously into a wide range of indoles under mild and metal-free
Solution‐Phase Late‐Stage Chemoselective Photocatalytic Removal of Sulfonyl and Phenacyl Groups in Peptides
作者:Samrat Kundu、Modhu Sudan Maji
DOI:10.1002/chem.202400033
日期:2024.4.16
overcoming the isolation issue up to octamers. Additionally, organophotocatalyst BPC demonstrates efficient solution-phase phenacyl deprotection from C-terminal in peptides. This effective and mild strategy portrayes exceptional selectivity by tolerating a wide range of functional groups in heteroaromatics and peptides.
本文提出了可见光介导的 BPC 催化的寡肽中色氨酸、酪氨酸和组氨酸氨基酸残基的后期溶液相脱磺酰化,克服了八聚体的分离问题。此外,有机光催化剂 BPC 表现出有效的溶液相苯甲酰基肽 C 端脱保护作用。这种有效且温和的策略通过耐受杂芳族化合物和肽中的各种官能团而展现出卓越的选择性。