Functionalized Carbodiimide Mediated Synthesis of 2,3-Disubstituted Quinazolin-4(3H)-ones via the Tandem Strategy of C-Nucleophilic Addition and Intramolecular NH-Substitution Cyclization
作者:Takao Saito、Hayato Nakano、Noriki Kutsumura
DOI:10.1055/s-0032-1316773
日期:——
moiety at the proximal estergroup. A facile synthesis of quinazolin-4(3H)-ones possessing carbon substituents at positions 2 and 3 has been developed. Key to the synthesis is a tandem strategy involving introduction of a 2-substituent and construction of the quinazolinone framework via C-nucleophilic addition to the carbodiimide cumulenic carbon followed by intramolecular nucleophilic substitution by
A novel superparamagnetic powerful guanidine-functionalized γ-Fe<sub>2</sub>O<sub>3</sub> based sulfonic acid recyclable and efficient heterogeneous catalyst for microwave-assisted rapid synthesis of quinazolin-4(3<i>H</i>)-one derivatives in Green media
作者:Fateme Haji Norouzi、Naser Foroughifar、Alireza Khajeh-Amiri、Hoda Pasdar
DOI:10.1039/d1ra05560g
日期:——
novel organic–inorganic nanohybrid superparamagnetic (γ-Fe2O3@CPTMS–guanidine@SO3H) nanocatalyst modified with sulfonicacid represents an efficient and green catalyst for the one-potsynthesis of quinazolin-4(3H)-one derivatives via three-component condensation reaction between anthranilic acid, acetic anhydride and different amines under microwave irradiation and solvent-free conditions (4a–q). XRD,
用磺酸改性的新型有机-无机纳米杂化超顺磁性(γ-Fe 2 O 3 @CPTMS-guanidine@SO 3 H)纳米催化剂代表了一锅法合成quinazolin-4(3 H )-one的高效绿色催化剂在微波辐射和无溶剂条件下,邻氨基苯甲酸、乙酸酐和不同胺之间的三组分缩合反应生成衍生物(4a - q)。XRD、FT-IR、FE-SEM、TGA、VSM 和 EDX 用于表征这种新型磁性有机催化剂。性能突出、响应时间短(15-30分钟)、操作简单、后处理简单、避免有毒催化剂是其显着优势。此外,它可以很容易地通过使用外部磁体的磁倾析从反应溶液中分离出来,并且可以循环至少六次而不会显着降低其活性。
A CONVENIENT SYNTHESIS OF 2-METHYL-3-SUBSTITUTED-4(3<i>H</i>)-QUINAZOLINONES USING<i>BIS</i>(TRICHLOROMETHYL) CARBONATE AS CONDENSING AGENT
作者:W. K. Su、D. Z. Wu、Y. Y. Xie、J. J. Li
DOI:10.1080/00304940609355984
日期:2006.2
4(3H)-Quinazolinones are well known as antihypertensive, antidiabetic, antiinflammatory, anticonvulsant, and antibacterial agents.' Some of the compounds are natural products? Thus, many synthetic methods have been reported. The simplest and most straightforward procedure was developed by Niementowski in 1899 and improved by Grimmel et al. in 1 9464 who reported that 4(3H)-quinazolinones could be synthesized