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,
One-pot synthesis of gem-difluorostyrenes from benzyl bromide via olefination of phosphonium ylide with difluorocarbene
作者:Xiao-Yun Deng、Jin-Hong Lin、Ji-Chang Xiao
DOI:10.1016/j.jfluchem.2015.06.009
日期:2015.11
A new approach for the synthesis of gem-difluorostyrenes from benzyl bromide is described. Quaternization of triphenylphosphine with benzyl bromide to give phosphonium salts, deprotonation of the corresponding phosphonium salts to produce phosphonium ylide, and the subsequent olefination of phosphonium ylide with difluorocarbene generated from difluoromethylene phosphobetaine (Ph3P+CF2CO2−) by decarboxylation
描述了一种由苄基溴合成宝石-二氟苯乙烯的新方法。的三苯基膦与苄基溴,得到鏻盐,相应的鏻盐,以产生磷叶立德,并与二氟卡宾从二氟亚甲基磷酸酯生成鏻内鎓盐的后续烯的脱质子化(PH季铵化3 P + CF 2 CO 2 -可以发生通过脱羧)在一个锅中平稳地进行,以高收率提供最终的宝石-二氟苯乙烯。
Ring-Closure Reactions of 1,2-Diaza-4,5-benzoheptatrienyl Metal Compounds: Experiment and Theory
5-benzoheptatrienyl metalcompounds 1a−m by treatment with KO-t-Bu as base. These metalcompounds undergo the various types of reactions in good yields and exclusively depending on the nature of substituents R1 and R3. Thus, metalcompounds 1a−c carrying alkyl substituents R1 and R3 form 3H-benzodiazepines 6a−c after electrophilic quench of the intermediate cyclic anion 7 in a 7-endo-trig electrocyclic reaction with
Wittig reactions of chromone-3-carboxaldehydes with benzylidenetriphenyl phosphoranes: a new synthesis of 3-styrylchromones
作者:Angela Sandulache、Artur M. S. Silva、Diana C. G. A. Pinto、L�cia M. P. M. Almeida、Jos� A. S. Cavaleiro
DOI:10.1039/b303554a
日期:——
An efficient route to 3-styrylchromones has been developed and applied to syntheses of several new derivatives. Wittig reactions of chromone-3-carboxaldehydes with some benzylic ylides gave a diastereomeric mixture of (E) and (Z)-3-styrylchromones that are separable by thin layer chromatography. The (Z)-isomers were the most abundant diastereomers independent of having electron-withdrawing or electron-donating
Rhodium-catalyzed tandem Pauson–Khand type reactions of 1,4-enynes tethered by a cyclopropyl group
作者:Gen-Qiang Chen、Min Shi
DOI:10.1039/c2cc37587g
日期:——
The tandem PausonâKhand type reactions of 1,4-enynes tethered by a cyclopropyl group with two molecules of CO proceed smoothly in the presence of [Rh(CO)2Cl]2 under a CO atmosphere to give the corresponding 6-hydroxy-2,3-dihydro-1H-inden-1-one derivatives in moderate yields under mild conditions.
在 CO 气氛下,[Rh(CO)2Cl]2 存在时,1,4-烯炔与两个 CO 分子的串联 PausonâKhand 型反应顺利进行,并在温和条件下以中等产率得到相应的 6-羟基-2,3-二氢-1H-茚-1-酮衍生物。