Tyrosine kinase inhibitors. 1. Structure-activity relationships for inhibition of epidermal growth factor receptor tyrosine kinase activity by 2,3-dihydro-2-thioxo-1H-indole-3-alkanoic acids and 2,2'-dithiobis(1H-indole-3-alkanoic acids)
摘要:
A series of 2,3-dihydro-2-thioxo-1H-indole-3-alkanoic acids, and their methyl esters were prepared, the majority by oxidation of 1H-indole-3-alkanoic acids (DMSO/HCl), followed by thiation of the corresponding 2,3-dihydro-2-oxo-1H-indole-3-alkanoic acid esters. The monomeric thiones undergo facile and reversible oxidation to the corresponding 2,2'-dithiobis(1H-indole-3-alkanoic acids). The compounds were evaluated for their abilities to inhibit the tyrosine kinase activity of the epidermal growth factor receptor using a native complex contained in plasma membrane vesicles shed from cultured A431 cells, and to inhibit the growth of Swiss 3T3 mouse fibroblast in culture. Enzyme inhibitory activity is dependent on the length of the side chain, with propanoic acid derivatives showing the highest activity. The acids are generally significantly more potent than the corresponding esters, and the disulfides more active than the corresponding monomers. An ability to undergo the thione-thiol tautomerism necessary for dimerization is essential, with 3,3-disubstituted compounds being inactive. Overall, the data suggest that the disulfide is the more active form, with much of the activity of the monomeric thiones being due to varying degrees of conversion to the disulfide during the assay. In the growth inhibition assay, the methyl esters are more potent than their corresponding carboxylic acids, and the dimers are generally more potent than the monomers. The data show these compounds to be a novel and potent class of inhibitors of epidermal growth factor receptor tyrosine kinase activity.
dual-metal-catalyzed asymmetric allylic alkylationreaction has been developed by makig use of challenging trisubstituted allylic esters and nucleophilic C3-substituted oxindole derivatives. A variety of allylated products bearing vicinal all-carbon quaternarystereocenters could be obtained in good yields with high to excellent diastereoselectivities (up to 20 : 1 dr) and enantioselectivities (up to 99 % ee)
Tyrosine kinase inhibitors. 1. Structure-activity relationships for inhibition of epidermal growth factor receptor tyrosine kinase activity by 2,3-dihydro-2-thioxo-1H-indole-3-alkanoic acids and 2,2'-dithiobis(1H-indole-3-alkanoic acids)
作者:Andrew M. Thompson、Gordon W. Rewcastle、Moana Tercel、Ellen M. Dobrusin、David W. Fry、Alan J. Kraker、William A. Denny
DOI:10.1021/jm00069a003
日期:1993.8
A series of 2,3-dihydro-2-thioxo-1H-indole-3-alkanoic acids, and their methyl esters were prepared, the majority by oxidation of 1H-indole-3-alkanoic acids (DMSO/HCl), followed by thiation of the corresponding 2,3-dihydro-2-oxo-1H-indole-3-alkanoic acid esters. The monomeric thiones undergo facile and reversible oxidation to the corresponding 2,2'-dithiobis(1H-indole-3-alkanoic acids). The compounds were evaluated for their abilities to inhibit the tyrosine kinase activity of the epidermal growth factor receptor using a native complex contained in plasma membrane vesicles shed from cultured A431 cells, and to inhibit the growth of Swiss 3T3 mouse fibroblast in culture. Enzyme inhibitory activity is dependent on the length of the side chain, with propanoic acid derivatives showing the highest activity. The acids are generally significantly more potent than the corresponding esters, and the disulfides more active than the corresponding monomers. An ability to undergo the thione-thiol tautomerism necessary for dimerization is essential, with 3,3-disubstituted compounds being inactive. Overall, the data suggest that the disulfide is the more active form, with much of the activity of the monomeric thiones being due to varying degrees of conversion to the disulfide during the assay. In the growth inhibition assay, the methyl esters are more potent than their corresponding carboxylic acids, and the dimers are generally more potent than the monomers. The data show these compounds to be a novel and potent class of inhibitors of epidermal growth factor receptor tyrosine kinase activity.
Reductive Coupling of Isatins with α,β-Unsaturated Carbonyl Compounds by Low-Valent Titanium
作者:Naoki Kise、Yuki Mitsui、Toshihiko Sakurai
DOI:10.1246/bcsj.20210357
日期:2022.1.15
The reductive coupling of isatins with α,β-unsaturatedcarbonylcompounds by Zn-TiCl4 in THF at 0 °C gave one-to-one coupled products, 3-hydoxy-3-alkyloxindoles. The coupled products obtained from α,β-unsaturated esters were transformed to the corresponding spiro-γ-lactones by refluxing in cat. PPTS/benzene. The two-to-one coupled products, 3,3-bis(2-carbomethoxyethyl)oxindoles, were formed by the
靛红与 α,β-不饱和羰基化合物在 0 °C 下通过 Zn-TiCl 4在 THF 中的还原偶联得到一对一的偶联产物,3-羟基-3-烷氧基吲哚。由α,β-不饱和酯获得的偶联产物通过在催化剂中回流转化为相应的螺-γ-内酯。PPTS/苯。2:1 偶联产物 3,3-双(2-碳甲氧基乙基)羟吲哚是通过 Zn-TiCl 4在 THF 中在 30 °C 下用丙烯酸甲酯还原靛红形成的。靛红与丙烯酸甲酯还原偶联得到的一对一偶联产物通过Zn-TiCl 4还原为3-(2-甲氧基乙基)羟吲哚在 30 °C 的 THF 中。将 3-(2- 碳甲氧基乙基) 羟吲哚加入丙烯腈中得到 3-(2- 碳甲氧基乙基)-3-(2-氰乙基) 羟吲哚。