螺环素 A、C 和 D 是已在海洋真菌菌株 LL-37H248 中鉴定的代谢物。它们独特的多环结构和有趣的生物活性使它们成为合成社区的有吸引力的目标。基于 5-取代萘醌的可扩展对映选择性环氧化、氧化/螺酮缩酮级联、苯酚单元的邻位选择性氯化和肟酯导向的乙酰氧基化、(-)-螺环素 A 和 C 的对映选择性全合成以及已经实现了 (-)-spiroxin D 的首次全合成。
Synthesis, biological evaluation, and correlation of cytotoxicity versus redox potential of 1,4-naphthoquinone derivatives
作者:Chien-Chang Shen、Shakil N. Afraj、Chia-Cheng Hung、Balaji D. Barve、Li-Ming Yang Kuo、Zhi-Hu Lin、Hisu-O. Ho、Yao-Haur Kuo
DOI:10.1016/j.bmcl.2021.127976
日期:2021.6
4-naphthoquinone derivatives of lawsone (1), 6-hydroxy-1,4-naphthoquinone (2), and juglone (3) were synthesized by alkylation, acylation, and sulfonylation reactions. The yields of lawsone derivatives 1a-1k (type A), 6-hydroxy-1,4-naphthoquinone derivatives 2a-2j (type B), and juglone derivatives 3a-3h (type C) were 52–99%, 53–96%, and 28–95%, respectively. All compounds were tested in vitro for the cytotoxicity
Compounds that Inhibit Production of sAPPB and AB and Uses Thereof
申请人:Kim Tae-wan
公开号:US20110071124A1
公开(公告)日:2011-03-24
The present invention relates to compounds with activity as inhibitors of sAPPβ and Aβ production, and methods for treating, preventing, or ameliorating neurodegenerative diseases, such as Alzheimer's disease and pharmaceutical compositions containing such candidate compounds.
Enantioselective Total Synthesis of (−)‐Spiroxins A, C, and D
作者:Xin Shu、Chong‐Chong Chen、Tao Yu、Jiayi Yang、Xiangdong Hu
DOI:10.1002/anie.202105921
日期:2021.8.16
targets for the synthetic community. Based on a scalable enantioselective epoxidation of 5-substituted naphthoquinone, an oxidation/spiroketalization cascade, ortho-selective chlorination of the phenol unit, and oxime-ester-directed acetoxylation, an enantioselectivetotalsynthesis of (−)-spiroxins A and C and the first totalsynthesis of (−)-spiroxin D have been achieved.
螺环素 A、C 和 D 是已在海洋真菌菌株 LL-37H248 中鉴定的代谢物。它们独特的多环结构和有趣的生物活性使它们成为合成社区的有吸引力的目标。基于 5-取代萘醌的可扩展对映选择性环氧化、氧化/螺酮缩酮级联、苯酚单元的邻位选择性氯化和肟酯导向的乙酰氧基化、(-)-螺环素 A 和 C 的对映选择性全合成以及已经实现了 (-)-spiroxin D 的首次全合成。
The Formation of 1,4-Quinones by Oxovanadium(IV)-Complexes Catalyzed Aerobic Oxygenation of Fused Aromatic Compounds
In the presence of a catalytic amount of oxovanadium(IV) complexes coordinated with 1,3-diketone ligands, fused aromatic compounds such as naphthalenes and naphthol derivatives are smoothly oxygenated into the corresponding 1,4-naphthoquinones by combined use of molecular oxygen and crotonaldehyde under an atmospheric pressure.