Catalytic Asymmetric Pictet–Spengler-Type Reaction for the Synthesis of Optically Active Indolo[3,4-<i>cd</i>][1]benzazepines
作者:Dao-Juan Cheng、Hai-Bian Wu、Shi-Kai Tian
DOI:10.1021/ol202361t
日期:2011.10.21
A new strategy has been introduced to develop a catalyticasymmetric Pictet–Spengler-type reaction by replacing the aldehyde with an imine. A range of 4-(2-aminoaryl)indoles smoothly undergo the chiral phosphoric acid catalyzed asymmetric Pictet–Spengler-type reaction with imines at room temperature to give structurally diverse indolo[3,4-cd][1]benzazepines in good to excellent yields and ee.
已经引入了一种新的策略,以通过用亚胺代替醛来开发催化不对称的Pictet-Spengler型反应。一系列4-(2-氨基芳基)吲哚在室温下与亚胺平稳地进行手性磷酸催化的不对称Pictet-Spengler型反应,得到结构良好的吲哚[3,4- cd ] [1]苯并ze庚因产量和ee。
Sonocatalyzed facile and mild one pot synthesis of gem-dichloroaziridine derivatives under alkaline conditions
作者:Hossein Naeimi、Khadijeh Rabiei
DOI:10.1016/j.ultsonch.2011.06.012
日期:2012.1
In this research, rapid and efficient preparation of 2,2-dichloro-1,3-diarylaziridines through the reaction of Schiff base compounds with dichlorocarbene yielded in situ from chloroform and sodium hydroxide without any phase transfer catalyst under ultrasonic irradiation is described. The advantages of this reaction are very short reaction times, excellent product yields, simplicity of the method and
Synthesis and Characterization of Tetrachloro-1,3-Oxazepine Derivatives and Evaluation of their Biological Activities
作者:Abdullah Hussein Kshash
DOI:10.17344/acsi.2019.5264
日期:——
6,7,8,9-Tetrachloro[1,3]oxazepine-1,5-dione derivatives 1b – 10b have been synthesized by reacting Schiff bases 1a – 10a with tetrachlorophthalicanhydride (TCPA) under (2 + 5 → 7) cycloaddition reaction conditons. All reactions had been monitored using TLC. FT IR and melting points have been used to characterize the Schiff bases; oxazepine compounds 1b – 10b were characterized using FT IR, 1 H NMR
在(2 + 5→7)环加成条件下,通过使席夫碱1a-10a与四氯邻苯二甲酸酐(TCPA)反应,合成了6,7,8,9-四氯[1,3]氮杂ze庚因-1,5-二酮衍生物1b-10b反应条件。使用TLC监测所有反应。傅立叶变换红外光谱和熔点已用于表征席夫碱。使用FT IR,1 H NMR及其熔点对奥氮平化合物1b – 10b进行了表征。评估了奥氮平化合物对细菌类型(金黄色葡萄球菌,大肠杆菌,克雷伯菌属)和真菌(土pp属)的生物活性。已经观察到针对使用过的细菌和真菌菌株具有可变的活性。
Montmorillonite as a Heterogeneous Catalyst in the Efficient, Mild and One Pot Synthesis of Schiff Bases under Solvent-Free Conditions
作者:Hossein Naeimi、Khadijeh Rabiei
DOI:10.1002/jccs.201100354
日期:2012.2
A mild and efficient method has been reported for preparation of Schiff base ligands through condensation reaction of various aromatic aldehydes and ketones with different aromatic amines in the presence of montmorillonite as a heterogeneous catalystunder solvent free conditions. The advantages of this friendly, economically, environmentally and mild method are such as; simplicity of the reaction
A Novel Catalyst-Free One-Pot Synthesis of Some New N-(α-Hydroxybenzyl)formamides by Treatment of 2,2-Dichloroaziridines with Dimethyl Sulfoxide and Water under Neutral Conditions
作者:Hossein Naeimi、Khadijeh Rabiei
DOI:10.1002/hlca.201100453
日期:2012.7
A novel, mild, and efficient method is reported for the preparation of new N‐(α‐hydroxybenzyl)formamides in excellent yields and appropriate reaction times through the reaction of 2,2‐dichloroaziridines with aqueous DMSO as the O‐donor underneutralconditions at 70–85°.