- Method for preparing 2,4-(1H,3H)-quinazoline diketone compound
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The invention discloses a method for preparing a 2,4-(1H,3H)-quinazoline diketone compound. A 2-aminobenzonitrile compound as shown in a formula (1) and carbon dioxide are used as raw materials and react in 2-hydroxypyridine ionic liquid to obtain the 2,4-(1H,3H)-quinazoline diketone compound as shown in a formula (II), and the reaction formula is as shown in the specification. When the ionic liquid is applied to the reaction for preparing the 2,4-(1H,3H)-quinazoline diketone compound, the reaction condition is mild, the separation and purification process of the product is simple, the product yield is high, and the substrate application range is wide.
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Paragraph 0052-0054; 0065
(2021/05/12)
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- AhR MODULATORS
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Provided herein are compounds, compositions and methods of using the compounds and compositions for the treatment of diseases modulated, as least in part, by AhR. The compounds are represented by formulae: (I) wherein the letters and symbols X1, X2, Z, R1b, R1c, R1d, R1e, R2a, R2b, R2c and R2d have the meanings provided in the specification.
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Paragraph 0242
(2019/08/29)
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- METHODS OF CULTURING AND/OR EXPANDING STEM CELLS AND/OR LINEAGE COMMITTED PROGENITOR CELLS USING LACTAM COMPOUNDS
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Provided are methods for expanding stem cells and/or lineage committed progenitor cells, at least in part, by using lactam compounds that antagonize AhR. The compounds are represented by formula (I): wherein the letters and symbols X1, X2, Z, R1b, R1c, R1d, R1e, R2a, R2b, R2c and R2d have the meanings provided below. Also provided are compositions comprising stem cells and/or lineage committed progenitor cells expanded by methods disclosed herein and methods for the treatment of diseases treatable by same.
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Paragraph 0344
(2019/12/28)
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- A 2, 4 - quinazoline dione compound preparation method
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The invention belongs to the field of organic chemistry, and concretely relates to a preparation method of benzoyleneurea compounds. The preparation method comprises the following steps: a 2-aminobenzonitrile compound and carbon dioxide are used as raw materials, preferably a reaction employs acylamino divalent rare earth metal amides and DBU as catalysts at 50-150 DEG C under a normal pressure, the reaction is carried out in an aprotic polar solvent for 4-40 hours, and the benzoyleneurea compounds are obtained with a high yield. The method has the advantages of mild reaction condition, few catalyst amount, simple separation and purification, high yield and wide substrate application range.
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Paragraph 0122; 0123
(2017/10/31)
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- Synthesis and Characterization of Amidato Divalent Lanthanide Complexes and Their Use in Forming 2,4-Quinazolidinones from CO2 and 2-Aminobenzonitriles
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Four amidato divalent lanthanide complexes, {LnLn[N(TMS)2]THF}2 [n = 1, Ln = Eu (1); n = 2, Ln = Eu (3), Yb (4); HL1 = tBuC6H4CONHC6H3(iPr)2; HL2 = C6H5CONHC6H3(iPr)2] and {L3Eu[N(TMS)2]THF}{L32Eu(THF)2} (2) [HL3 = ClC6H4CONHC6H3(iPr)2], were synthesized and extensively characterized. This is the first time that the amidato lanthanide amides 1-4 were used to catalyze the reactions of CO2 and 2-aminobenzonitriles to form quinazoline-2,4(1H,3H)-diones at atmospheric pressure. All the complexes efficiently catalyzed the transformation, with complex 3 showing the highest activity. This catalytic system gave good to excellent yields, and good functional group tolerance. Preliminary studies were conducted to investigate the reaction mechanism.
- Wang, Qianyu,Lu, Chengrong,Zhao, Bei,Yao, Yingming
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p. 2555 - 2559
(2016/06/01)
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- Efficient synthesis of quinazoline-2,4(1H,3H)-diones from CO2 catalyzed by N-heterocyclic carbene at atmospheric pressure
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Under atmospheric pressure, quinazoline-2,4(1H,3H)-diones were obtained from the reaction of 2-aminobenzonitriles with carbon dioxide (0.1 MPa) with a catalytic amount of N-heterocyclic carbene in DMSO. It was found that various electron-donating and electron-withdrawing groups such as -OMe, -F, -Cl, -Br, -CH3, -CF3 and -CN were well tolerated to give the products in almost quantitative yields.
- Xiao, Yunqing,Kong, Xianqiang,Xu, Zhicheng,Cao, Changsheng,Pang, Guangsheng,Shi, Yanhui
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p. 5032 - 5037
(2015/03/03)
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