在大气压和室温下从邻氨基苯甲酰胺和 CO2 合成 N-未取代和 N3-取代的喹唑啉-2,4(1H,3H)-二酮
摘要:
开发了在大气压和室温下从邻氨基苯甲酰胺和 CO 2空前无金属合成N-未取代和N 3-取代喹唑啉-2,4(1 H ,3 H ) -二酮的方法。该协议很容易允许N 3 位的官能团(包括烷基、芳基和杂环基团)发生变化,以适应许多重要药物和生物活性化合物的构建。该反应具有生态友好、底物范围耐受性和多功能性的特点,甚至可以在克级实施。
AbstractA new and efficient synthetic process has been developed for preparation of 2-thioxoquinazolinone and quinazolinobenzothiazinedione derivatives. The related products were synthesized through reaction of isatoic anhydride, amines/anthranilic acids, and carbon disulfide (CS2) in the presence of potassium hydroxide in ethanol at reflux. Graphical abstract
An efficient one pot synthesis of 2-amino quinazolin-4(3 H )-one derivative via MCR strategy
作者:V. Narayana Murthy、Satish P. Nikumbh、S. Praveen Kumar、L. Vaikunta Rao、Akula Raghunadh
DOI:10.1016/j.tetlet.2015.08.040
日期:2015.10
multi-component reaction strategy was developed for the construction of important building blocks, 2-amino 3-substituted quinazolinone derivatives from isatoic anhydride and amine with electrophilic cyanating compound, N-cyano-4-methyl-N-phenylbenzenesulfonamide (NCTS). The quinazolinone synthesis proceeds via a sequential series of reactions such as nucleophilic attack of the amine group on the carbonyl group
A Series of Novel Ninhydrin-derived Spiro-quinazolinone Derivatives in Moderate to Good Yields Have Been Synthesised Through a Ferric Chloride Catalysed Reaction in 1,2-dichloroethane.
aminopeptidase (IRAP) is a new potential macromolecular target for drugs aimed for treatment of cognitive disorders. Inhibition of IRAP by angiotensin IV (Ang IV) improves the memory and learning in rats. The majority of the known IRAPinhibitors are peptidic in character and suffer from poor pharmacokinetic properties. Herein, we present a series of small non‐peptide IRAPinhibitors derived from a spiro‐oxindole
amines with aceticacid in ethyl acetate/acetone using irradiation with UV light for the synthesis of 2-aminobenzamides in high yields; 32 examples proceeded successfully by this photo-induced protocol in up to 92% yield. The reaction was also readily achieved on a gram scale. The utility of the 2-aminobenzamide building block in organic synthesis was shown by their use in the preparation of quinazolinone