pilot series of aromatic esters of galanthamine, 3-O-methylpancracine, vittatine and maritidine were synthesized to increase biological activity. The semisynthetic derivatives of AAs were screened for their in vitro antimycobacterial activity against Mycobacterium tuberculosis H37Ra and two other mycobacterial strains (M. aurum, M. smegmatis) using a modified Microplate Alamar Blue Assay. The most active
寻找新型抗分枝杆菌药物是当务之急,因为肺结核仍然是单一传染原导致的十大死因之一,全世界每年有超过 140 万人因此丧生。已经筛选了九种不同结构类型的石蒜科生物碱 (AAs) 的抗分枝杆菌活性。不幸的是,所有这些都被认为是无活性的,因此合成了加兰他敏、3- O-甲基潘克拉辛、vittatine 和 maritidine 的一系列试验性芳香酯以增加生物活性。筛选了 AA 的半合成衍生物对结核分枝 杆菌H37Ra 和其他两种分枝杆菌菌株(金黄色分枝杆菌、耻垢分枝杆菌)的体外抗分枝杆菌活性。) 使用改良的微孔板 Alamar Blue Assay。还研究了最具活性的化合物对肝细胞癌细胞系 HepG2 的体外肝毒性。一般来说,原始 AA 的衍生化与抗分枝杆菌活性的显着增加有关。几种中试衍生物被鉴定为对结核分枝杆菌H37Ra具有微摩尔 MIC 的化合物。选择加兰他敏的两种衍生物1i和1r进行进一步结构优化以提高选择性指数。
Construction of the 5,10b-Phenanthridine Skeleton Using [3+2]-Cycloaddition of a Non-Stabilized Azomethine Ylide: Total Synthesis of (±)-Maritidine and (±)-Crinine Alkaloids
作者:Ganesh Pandey、Nishant R. Gupta、Smita R. Gadre
DOI:10.1002/ejoc.201001263
日期:2011.2
well as stereochemical origin of this cycloaddition reaction is explained through a favorable transition state 9". The strategy is successfully applied for the totalsynthesis of the biologically active alkaloids (±)-maritidine (1a), (±)-crinine (1b), and their analogues (1d, 1e, and 1f).
Stereoselective One-Step Construction of Vicinal Quaternary and Tertiary Stereocenters of the 5,10b-Ethanophenanthridine Skeleton: Total Synthesis of (±)-Maritidine
作者:Ganesh Pandey、Nishant R. Gupta、Tukaram M. Pimpalpalle
DOI:10.1021/ol900806m
日期:2009.6.18
The challenging vicinal quaternary and tertiary stereocenters of the 5,10b-ethanophenanthridine skeleton are created in a single step utilizing intramolecular [3 + 2]-cycloaddition of nonstabilized azomethine ylide as the key step. The application of the chemistry is demonstrated by synthesizing (±)-maritidine.
A General Electro‐Synthesis Approach to Amaryllidaceae Alkaloids
作者:Dennis Pollok、Luca M. Großmann、Torsten Behrendt、Till Opatz、Siegfried R. Waldvogel
DOI:10.1002/chem.202201523
日期:2022.9.6
Highly pharmaceutically relevant Amaryllidaceae alkaloids have been accessed by a versatile electro-organic key transformation, including a precursor of the acetylcholinesterase inhibitor galantamine, used as FDA-approved drug for the treatment of Alzheimer's disease. Spirodienone-type intermediates were obtained in a regioselective and sustainable anodic key transformation from nature-derived starting
高度药学相关的石蒜科生物碱已通过多功能电有机关键转化获得,其中包括乙酰胆碱酯酶抑制剂加兰他敏的前体,该药物被 FDA 批准用作治疗阿尔茨海默病的药物。螺二烯酮型中间体是通过区域选择性和可持续的阳极关键转化从天然原料中获得的
Kihara, Masaru; Koike, Tomomi; Imakura, Yasuhiro, Chemical and pharmaceutical bulletin, 1987, vol. 35, # 3, p. 1070 - 1075