Novel 6-substituted 2-aminotetralins with potent and selective affinity for the dopamine D3 receptor
摘要:
Starting from (1S,2R)-5-methoxy-1-methyl-2-N,N-dipropylaminotetralin [(+)-UH-232] as a lead structure, a series of novel 6-substituted 2-aminotetralins have been discovered which show high affinity for dopamine D-3 receptors. One compound, GR218231, exhibits ca. 400 fold selectivity for the dopamine D-3 receptor over the D-2 receptor and ca. 10,000 fold selectivity with respect to D-1 and D-4 receptors.
synthesized from betulinic acid by its oxidation to 30-oxobetulinic acid followed by the Wittig reaction. Cytotoxicity of all compounds was tested in vitro in eight cancer cell lines and two noncancer fibroblasts. Almost all dienes were more cytotoxic than betulinic acid. Compounds 4.22, 4.30, 4.33, 4.39 had IC50 below 5 μmol/L; 4.22 and 4.39 were selected for studies of the mechanism of action. Cell cycle
通过将桦木酸氧化为 30-氧代桦木酸,然后进行 Wittig 反应,合成了一组新的取代二烯。在八种癌细胞系和两种非癌成纤维细胞中体外测试了所有化合物的细胞毒性。几乎所有的二烯都比桦木酸更具细胞毒性。化合物4.22、4.30、4.33、4.39的IC 50低于5 μmol / L ;选择4.22和4.39进行作用机制研究。细胞周期分析显示在 5 × IC 50时凋亡细胞数量增加浓度,其中可以预期导致细胞死亡的不可逆变化的激活。既4.22和4.39导致细胞在用DNA / RNA合成的部分抑制的G0 / G1期的累积为1×IC 50,并在5几乎完全抑制×IC 50。有趣的是,化合物4.39 在 5 × IC 50导致细胞在 S 期积累。较高浓度的受试药物可能比较低浓度抑制更多的脱靶。破坏细胞代谢的机制可以诱导细胞在 S 期的积累。化合物4.22和4.39 均在癌细胞中引发选择性凋亡通过内在途径,
Flash vacuum pyrolysis of stabilised phosphorus ylides. Part 6. Pyrolysis of substituted cinnamoyl ylides as a route to conjugated enynes
作者:R. Alan Aitken、Christine Boeters、John J. Morrison
DOI:10.1039/p19940002473
日期:——
The substituted cinnamoyl ylides 6 and 7, readily prepared in one step from the quaternary phosphonium salts 8 and cinnamoyl chlorides 9, undergo extrusion of Ph3PO upon FVP to give the 1,3-enynes 12 and 13 in moderate yield. At 500 °C there is little double bond isomerisation, but at 700 °C this does occur to give almost 1:1 mixtures of E and Z isomers. In a few cases, including those with a nitrophenyl
由季phospho盐8和肉桂酰氯9一步制备的取代肉桂酸酯基化物6和7在FVP上经过Ph 3 PO挤出,以中等收率得到1,3-烯炔12和13。在500°C下几乎没有双键异构化,但是在700°C时确实发生了几乎1:1的E和Z混合物异构体。在少数情况下,包括存在硝基苯基的情况,收率很低或反应完全失败。通过使用酯稳定的内酯来改善1-苯基丁烯的不良产率的尝试仅部分成功,因为失去酯基所需的苛刻条件导致明显的异构化为萘。报告了20个炔的完全归属的13 C NMR光谱。已经制备了一个异构体β,γ-不饱和-δ-氧代酰化物的例子,14,发现在700°C下FVP上的Ph 3 P损失,从而以低收率得到了茚和苯。
Reactions at high pressure, part 18; volumes of activation and of reaction for the wittig reaction
作者:Neil S. Isaacs、Obeid Hassan Abed
DOI:10.1016/s0040-4039(00)84159-3
日期:1986.1
between 1 and 1000 bar of reactions between triphenyl-p-nitrobenzylidenephosphorane, and a series of substituted benzaldehydes .Values of ΔV≠ lie in the range −20 to −30 cm3mol−1 and are somewhat solvent-dependent. The corresponding volume of reaction is less negative. These measurements are in agreement with the accepted reaction mechanism and suggest that the scope of the reaction may be extended by the
Reactions of Phosphonium Ylides with S<sub>8</sub>or Se in the Presence of Amines. Formation of Thioaldehydes or Selenoaldehydes
作者:Kentaro Okuma、Yasuo Komiya、Hiroshi Ohta
DOI:10.1246/cl.1988.1145
日期:1988.7.5
The reaction of phosphonium ylides with elemental sulfur gave thioaldehydes which were successfully changed to corresponding thioamides when treated with secondary amines. On the other hand, the reaction of selenoaldehydes with secondary amines afforded bis(dialkylamino)methanes in good yields.
measurements for the thermalrearrangement of 2,2‐diphenyl‐1‐[(E)‐styryl]cyclopropane (22a) to 3,4,4‐triphenylcyclopent‐1‐ene (23a) in decalin furnished ΔH=31.0±1.2 kcal mol−1 and ΔS=−6.0±2.6 e.u. The lowering of ΔH≠ by 20 kcal mol−1, compared with the rearrangement of the vinylcyclopropane parent, is ascribed to the stabilization of a transition structure (TS) with allylic diradical character. The racemization