介绍了一种通过 quinazolin-3-氧化物与伯胺反应合成 quinazolin-4(3 H )-ones 的有效且简便的方法。这种方法被证明适用于广泛的底物,并且在使用容易获得的叔丁基过氧化氢作为氧化剂的无金属和温和的反应条件下有效地进行。值得注意的是,3-(2-(1 H -indol-3-yl) ethyl)quinazolin-4(3 H )-one 3w是通过该方法方便地以 70% 的收率获得的,是合成生物活性吴茱萸碱和鲁坦平。
Reductive Synthesis of Aminal Radicals for Carbon–Carbon Bond Formation
作者:David A. Schiedler、Yi Lu、Christopher M. Beaudry
DOI:10.1021/ol500024q
日期:2014.2.21
Aminal radicals were generated by reduction of the corresponding amidine or amidinium ion. The intermediate radicals participate in C–C bond-forming reactions to produce fully substituted aminal stereocenters. No toxic additives or reagents are required. More than 30 substrate combinations are reported, and chemical yields are as high as 99%.
The invention relates to a method for producing quinazolinone derivatives of general formula (I), wherein the radicals R
1
to R
3
have the meanings indicated in the claims and the description.
该发明涉及一种生产通式(I)的喹唑啉酮衍生物的方法,其中基团R1至R3具有索引中所示的含义。
Discovery of novel 3-benzylquinazolin-4(3 H )-ones as potent vasodilative agents
In the present study, a series of 3-benzylquinazolin-4(3H)-ones were synthesized and characterized. Their vasodilative effects were evaluated by wire myograph on isolated rat mesenteric arterial ring induced contraction with 60 mM KCl. The SAR of target compounds was discussed preliminarily. Among these compounds, 2a and 2c displayed potent vasodilatation action and could compete significantly the
在本研究中,合成并表征了一系列3-苄基喹唑啉-4(3 H)-one 。通过钢丝肌电图仪评估其对离体大鼠肠系膜动脉环诱导的60 mM KCl收缩的血管舒张作用。初步讨论了目标化合物的SAR。在这些化合物中,2a和2c表现出有效的血管舒张作用,并且可以与苯肾上腺素显着竞争大鼠肠系膜动脉环诱导的收缩。通过口服给药,进一步测试了化合物2a和2c在SHR中的抗高血压作用。结果表明2a和2c可以显着降低舒张压和收缩压。此外,2c以剂量依赖性方式显示抗高血压作用,并且在4.0 mg / kg的剂量下可维持6 h的作用。这些发现表明标题化合物是新型血管舒张剂,代表了一系列新的有希望的降压药。
Nickel‐Catalyzed Intermolecular Branched/Linear Regioselective C−H Alkylation of 4‐Oxoquinazolines
activated 4-oxoquinazolines with aryl and alkyl alkenes was demonstrated. When aryl alkenes are used as the substrates, the regioselection of the reaction can be fine-tuned by choosing a NHC ligand with appropriate steric hindrance to harvest branched adducts, while the use of a bulky NHC/alkyl aluminum cocatalyst system helps to steer the reaction towards linear products. For alkyl alkene substrates, Ni(cod)2
Visible light-induced cascade <i>N</i>-alkylation/amidation reaction of quinazolin-4(3<i>H</i>)-ones and related N-heterocycles
作者:Jiexiong Mai、Ziwei Huang、Shaohuan Lv、Quan Chen、Rongrong Chen、Feng Xie、Jun Wang、Bin Li
DOI:10.1039/d2ob02226e
日期:——
An efficient and visible light-promoted cascade N-alkylation/amidation of quinazolin-4(3H)-ones with benzyl halides and allyl halides has been described for the first time to provide a convenient access to quinazoline-2,4(1H,3H)-diones. This cascade N-alkylation/amidation reaction shows good functional group tolerance and could also be applied to N-heterocycles such as benzo[d]thiazoles, benzo[d]imidazoles
首次描述了喹唑啉-4(3 H )-与苄基卤化物和烯丙基卤化物的有效且可见光促进的级联N-烷基化/酰胺化,以提供对喹唑啉-2,4(1 H)的便捷途径,3 H )-二酮。这种级联N-烷基化/酰胺化反应显示出良好的官能团耐受性,也可应用于 N-杂环,如苯并 [ d ] 噻唑、苯并 [ d ] 咪唑和喹唑啉。对照实验表明,K 2 CO 3在这种转化中起着重要作用。