Imatinib and itsanalogues were successfully synthesized by an improved method in 19.5– 46.2% total yield of six main steps. Pyrimidinyl amine was prepared by the reaction of enaminone and guanidine nitrate without the use of a toxic cyanamide. N-(2-Methyl-5-nitrophenyl)-4-(pyridin-3-yl) pyrimidin-2-amine as a key intermediate for the synthesis of imatinib was prepared by copper-catalyzed N-arylation
伊马替尼及其类似物通过改进的方法成功地合成了六个主要步骤,总收率为19.5–46.2%。嘧啶胺是通过烯胺酮和硝酸胍的反应制备的,无需使用有毒的氰胺。ñ - (2-甲基-5-硝基苯基)-4-(吡啶-3-基)嘧啶-2-胺,制备由铜催化的关键中间体为伊马替尼的合成ñ产率为82%的杂芳基胺-arylation 。在此C-N键形成反应中,使用铜盐代替了昂贵的钯化合物。使用水作为溶剂,通过N 2 H 4 ·H 2 O / FeCl 3 / C体系将中间体硝基化合物还原。
Palladium-Catalyzed Cross-Couplings of Lithium Arylzincates with Aromatic Halides: Synthesis of Analogues of Isomeridianin G and Evaluation as GSK-3β Inhibitors
Several analogues of isomeridianin G have been synthesized using palladium-catalyzedcross-couplingreactions of lithium triorganozincates as a key step. The latter have been prepared by deprotonative lithiation followed by transmetalation using ZnCl2˙TMEDA (0.33 equiv). cross-coupling - heterocycles - palladium - zinc - lithium
A supported palladium nanocatalyst for copper free acyl Sonogashira reactions: One-pot multicomponent synthesis of N-containing heterocycles
作者:Subhankar Santra、Kalyan Dhara、Priyadarshi Ranjan、Parthasarathi Bera、Jyotirmayee Dash、Swadhin K. Mandal
DOI:10.1039/c1gc15869d
日期:——
efficient heterogeneous nanocatalytic system for the copper free acyl Sonogashirareaction. A wide range of ynones was synthesized in high yields undermildreactionconditions. The catalyst was recovered and recycled up to four times. Transmission electron microscopy (TEM) images revealed that the catalyst maintained nanospheric dimensions for four consecutive catalytic cycles. This simple protocol was further
Synthesis, Herbicidal Activity, Crop Safety and Soil Degradation of Pyrimidine- and Triazine-Substituted Chlorsulfuron Derivatives
作者:Lei Wu、Yu-Cheng Gu、Yong-Hong Li、Sha Zhou、Zhong-Wen Wang、Zheng-Ming Li
DOI:10.3390/molecules27072362
日期:——
previous study found that diethylamino-substituted chlorsulfuron derivatives accelerated the degradation rate in soil. In order to obtain sulfonylurea herbicides with good crop safety for both wheat and corn, while maintaining high herbicidalactivities, a series of pyrimidine- and triazine-based diethylamino-substituted chlorsulfuron derivatives (W102–W111) were systematically evaluated. The structures of
氯磺隆是一种经典的磺酰脲类除草剂,对小麦表现出良好的安全性,但在麦玉米轮作模式下对后续玉米造成一定程度的损害,自2014年起在我国暂停了田间施用。我们前期的研究发现,二乙氨基取代的氯磺隆衍生物加速了土壤中的降解速度。为了获得对小麦和玉米均具有良好作物安全性,同时保持高除草活性的磺酰脲类除草剂,对一系列嘧啶基和三嗪基二乙氨基取代的氯磺隆衍生物( W102 - W111 )进行了系统评价。合成的化合物的结构通过1 H NMR、 13 C NMR、HRMS进行了确认。初步的生物学测定结果表明4,6-二取代嘧啶和三嗪衍生物能够保持较高的除草活性。研究发现,合成的化合物在酸性和碱性土壤中都可以加速降解速度。特别是在碱性土壤中,目标化合物的降解速度比氯磺隆加快了22倍以上。此外,大多数氯磺隆类似物在高剂量下对小麦和玉米都表现出良好的作物安全性。该研究为进一步设计除草活性高、降解速度快、作物安全性高的新型磺酰脲类除草剂提供了参考。
Pyrimidine derivatives for treatment of hyperproliferative disorders
申请人:Dixon A. Julie
公开号:US20050277640A1
公开(公告)日:2005-12-15
Pyrimidine derivatives of formula (I)
in which J and Y represent aromatic or heteroaromatic rings; R
2
, G, G′, and G″ represent substituent groups and R
2a
represents H or halogen; L represents a linking group; and M represents CH or N. Pharmaceutical compositions containing these compounds, and methods of using these compounds in treatment of hyperproliferative diseases such as cancer are also disclosed and claimed.