Disclosed herein are KCNQ potassium channels modulators of formula (I)
wherein G
1
, R
2
, R
1a
, R
1b
, X, X
1
, X
2
, X
3
, R
x
, J, k, n, q, and t are as defined in the specification. Compositions comprising such compounds; and methods for treating conditions and disorders using such compounds and compositions are also described.
Design, Synthesis, and Structure–Activity Relationship of Quinazolinone Derivatives as Potential Fungicides
作者:Jing-Wen Peng、Xiao-Dan Yin、Hu Li、Kun-Yuan Ma、Zhi-Jun Zhang、Rui Zhou、Yu-Ling Wang、Guan-Fang Hu、Ying-Qian Liu
DOI:10.1021/acs.jafc.0c05475
日期:2021.4.28
Plant diseases caused by phytopathogenic fungi reduce the yield and quality of crops. To develop novel antifungal agents, we designed and synthesized eight series of quinazolinone derivatives and evaluated their anti-phytopathogenic fungal activity. The bioassay results revealed that compounds KZL-15, KZL-22, 5b, 6b, 6c, 8e, and 8f exhibited remarkable antifungal activity in vitro. Especially, compound
Aziridination of cyclic dienes with enantiopure 3-acetoxyaminoquinazolin-4(3H)-ones
作者:Robert S. Atkinson、Christopher K. Meades
DOI:10.1039/b102592a
日期:——
Aziridination of cyclopentadiene and cyclohepta-1,3-diene with (S)-3-acetoxyamino-2-(3-hydroxy-2,2-dimethylpropyl)quinazolin-4(3H)-one 6 (Q1NHOAc) in the presence of titanium(IV) tert-butoxide in dichloromethane takes place highly diastereoselectively: X-ray structure determinations show that the preferred sense of diastereoselectivity in both cases is the same as that previously found for aziridination of butadiene with 6. Aziridination of cyclohexa-1,3-diene with 6 was less diastereoselective in dichloromethane solution but highly diastereoselective in acetonitrile: in this solvent two diastereoisomeric cis-4-(Q1-amino)cyclohexen-3-ols 27 and 28 were also obtained as by-products. The same two amino
alcohols were obtained by ring-opening of the aziridine with acid and were each converted into Q1-free oxazolidinones having optical rotations which were similar in magnitude but opposite in sign.
Aziridination of alkenes using 2-substituted-3-acetoxyamino-quinazolin-4(3H )-ones: changes in transition state geometry resulting from addition of trifluoroacetic acid or by an electron-withdrawing 2-substituent
作者:Robert S. Atkinson、Sabri Ulukanli
DOI:10.1039/a809703h
日期:——
are interpreted as supporting a change in transition state geometry from one where (Q)CO/(ester)CO overlap 7b is replaced by (Q)CN+H/(ester)CO overlap 7c (Q = quinazolinone). Aziridinations of methyl or tert-butyl acrylate using 2-trifluoromethyl-substituted 3-acetoxyaminoquinazolinones 20 and 21 take place with (Q)CN/(ester)CO overlap 22 even in the absence of TFA.
TFA对3-乙酰氧基氨基喹唑啉酮2和10与丙烯酸甲酯和丙烯酸叔丁酯竞争反应的影响被解释为支持过渡态几何形状的变化,其中(Q)C O /(酯)C O重叠7b被(Q)C N + H /(酯)C O重叠7c取代(Q =喹唑啉酮)。即使不存在TFA,使用2-三氟甲基取代的3-乙酰氧基氨基喹唑啉酮20和21进行丙烯酸甲酯或丙烯酸叔丁酯的氮杂环化反应也具有(Q)C N /(酯)C O重叠22。
Carbon–hydrogen bond insertion reactions of 3-acetoxy-aminoquinazolin-4(3H)-ones with cyclic dienes: stereochemistry and mechanism
作者:Robert S Atkinson、Christopher K Meades
DOI:10.1016/s0040-4020(01)01246-7
日期:2002.2
cyclohexadienyl ring carbon has been correlated with that at the 6-position of the major aziridine diastereoisomer co-produced in the reaction. A mechanism involving concerted insertion into the C–H bond of the diene by QNHOAc is proposed with endo-overlap of both double bonds of the diene with the Q group in the transition state.
2-取代的3-乙酰氧基氨基喹唑啉-4(3 H)-ones(QNHOAc)与环己-1,3-二烯或环己-1,4-二烯(2当量)的反应除了稳定的叠氮化产物外,还可以稳定通过将[QN̈:]插入双烯丙基CH键中而正式产生的二氢芳族副产物。发生类似的插入9,10-二氢蒽或v吨(1.5-2当量)的亚甲基CH键的过程。使用3- acetoxyamino -2 - [(小号)-2,2-二甲基-1-羟基丙基]喹唑啉-4(3 H ^) -酮2(Q 1在钛的存在下NHOAc)(IV)吨-丁氧基,完全非对映选择性地插入环己-1,3-二烯中,并且在环己二烯基环碳上的构型与反应中共同生成的主要氮丙啶非对映异构体的6位上的构型相关。提出了一种机制,该机制涉及通过QNHOAc一致地插入二烯的CH键中,二烯的两个双键均与Q基团处于过渡态时发生内重叠。