New 12-N-β-Hydroxyethylcytisine Derivatives with Potential Antiarrhythmic Activity
作者:I. P. Tsypysheva、A. V. Koval’skaya、I. U. Khalilova、Yu. Yu. Bakhtina、R. Yu. Khisamutdinova、S. F. Gabdrakhmanova、A. N. Lobov、F. S. Zarudii、M. S. Yunusov
DOI:10.1007/s10600-014-0945-5
日期:2014.5
12-N-β-Hydroxyethylcytisine derivatives containing Cl, Br, and nitro groups on the 2-pyridone core were synthesized. Their antiarrhythmic activity was studied in vivo.
Insecticidal activity of twin compounds from podophyllotoxin and cytisine
作者:Yuanyuan Zhang、Min Lv、Hui Xu
DOI:10.1016/j.bmcl.2021.128104
日期:2021.7
twin compounds were prepared from two natural products podophyllotoxin and cytisine, which are isolated from the plants Podophyllum hexandrum and Thermopsis lanceolata, respectively. Compounds IIa (X = Cl, Y = R1 = R2 = H), IIIc (X = Y = R1 = R2 = Cl) and IVd (X = R1 = R2 = Br, Y = H) exhibited >2-fold potent insecticidal activity of podophyllotoxin against armyworm with FMRs greater than 60%. SARs were
探索基于天然产物杀虫剂候选,并且在农业天然植物的高附加值的应用,一系列双化合物从两个天然产物鬼臼毒素和野靛碱,这是从该植物中分离的制备鬼臼hexandrum和披针叶黄华分别. 化合物IIa (X = Cl,Y = R 1 = R 2 = H)、IIIc (X = Y = R 1 = R 2 = Cl) 和IVd (X = R 1 = R 2 = Br, Y = H) 显示鬼臼毒素对粘虫的 2 倍以上有效杀虫活性,FMR 大于 60%。还观察到 SAR。值得注意的是,首次提出了双杀虫剂的想法。我们希望这一想法将有助于设计新的双杀虫剂,为未来六味子和披针草作为潜在的植物性农药在农业中的高附加值应用奠定基础。
Conjugates of 9- and 11-Halo-Substituted Cytisines with 1′-N-Methylurocanic Acid
作者:P. R. Petrova、A. V. Koval’skaya、A. N. Lobov、I. P. Tsypysheva
DOI:10.1007/s10600-019-02905-2
日期:2019.11
New (–)-cytisinederivatives were synthesized by conjugating 9- and 11-halo-substituted cytisines with 1′-N-methylurocanic acid using N-hydroxysuccinimide.
Synthesis of Several Cytisine Derivatives and their Cytotoxicities against A431, A375, and HCT 116 Tumor Cell Lines
作者:P. R. Petrova、A. V. Koval′skaya、I. P. Tsypysheva、A. S. Bunev
DOI:10.1007/s10600-020-03177-x
日期:2020.9
inhibit metabolic activity of these celllines except benzylcytisine 4, methylcytisines 18 and 19, which contained a phenylurea fragment in the 9- or 11-position of the 2-pyridone core, and 11-chloro adamantylthiocarboxamide 16. Thiocarboxamide 16 reduced A431 cell survival up to 56.06% under the experimental conditions; derivatives4, 18, and 19, of HCT 116 cell line by 57.52, 58.84, and 56.34%, respectively
Syntheses and evaluation of halogenated cytisine derivatives and of bioisosteric thiocytisine as potent and selective nAChR ligands
作者:P Imming
DOI:10.1016/s0223-5234(01)01222-3
日期:2001.4
We have developed one-step syntheses of halogenated derivatives of (-)-cytisine featuring a halogen substituent at positions 3, 5 or 3 and 5 of the 2-pyridone fragment, and prepared the novel bioisosteric thiocytisine by oxygen-sulphur exchange. The affinities of these pyridone-modified analogs of (-)-cytisine for (alpha (4))(2)(beta (2)),(3) and alpha7* nAChRs in rat forebrain membranes were determined by competition with (+/-)-[H-3]epibatidine and [H-3]MLA, respectively. The 3-halocytisines 7 possess subnanomolar affinities for (alpha4)(2)(beta2)(3) nAChRs, higher than those found for (-)-cytisine as well as for the 5-halocytisines 8 and 3,5-dihalocytisines 6. In contrast to the parent alkaloid the 3-halogenated species display much a higher affinity for the alpha7* nAChR subtype. The most potent molecule was 3-bromocytisine (7b) with preferential selectivity (200-fold) for the (alpha4)(2)(beta2)(3) subtype [K-i = 10 pM (alpha4 beta2) and 2.0 nM (alpha7*)]. Replacement of the lactam with a thiolactam pharmacophore to thiocytisine (12) resulted in a subnanomolar affinity for the (alpha4)(2)(beta2)(3) nAChR subtype (K-i = 0.832 nM), but in a drastic decrease of affinity for the alpha7* subtype; thiocytisine (12) has a K-i value of 4000 nM (alpha7*), giving a selectivity of 4800-fold for the neuronal (alpha4)(2)(beta2)(3)-nAChR and thus displaying the best affinity-selectivity profile in the series under consideration. (C) 2001 Editions scientifiques et medicales Elsevier SAS.