Palladium‐Catalyzed Decarboxylative Synthesis of 5
<i>H</i>
‐Benzo[4,5][1,3]oxazino[2,3‐
<i>a</i>
]isoindole‐5,11(6a
<i>H</i>
)‐Diones using 2‐Phenyl‐4
<i>H</i>
‐Benzo[
<i>d</i>
][1,3]oxazin‐4‐Ones and α‐Oxo Carboxylic Acids
作者:Ram Sunil Kumar Lalji、Prashant Kumar、Mohit Gupta、Virinder S. Parmar、Brajendra K. Singh
DOI:10.1002/adsc.201901142
日期:2020.2.6
A Pd‐catalyzed novel and efficient protocol has been developed for the direct functionalization of 2‐phenyl‐4H‐benzo[d][1,3]oxazin‐4‐ones with α‐oxocarboxylicacids resulting in 5H‐benzo[4,5][1,3]oxazino[2,3‐a]isoindole‐5,11(6aH)‐dionesusing (NH4)2S2O8 as effective oxidant and AgNO3 as co‐oxidant. All the explored substrates were found to be compatible for this transformation and delivered the corresponding
已开发出一种Pd催化的新颖有效的方案,可将2-苯基-4- H-苯并[ d ] [1,3]恶嗪-4-酮与α-氧代羧酸直接官能化,生成5 H-苯并[ 4,5] [1,3]恶嗪基[2,3 - a ]异吲哚-5,11 (6a H)-二酮使用(NH 4)2 S 2 O 8作为有效氧化剂,AgNO 3作为共氧化剂。发现所有探索的底物均适用于该转化,并以中等至优异的产率递送了相应的所需产物。
Synthesis and anticancer activity of novel quinazolinone and benzamide derivatives
作者:Maher Abd El-Aziz Mahmoud El-Hashash、Marwa Sayed Salem、Selima Ali Mohamed Al-Mabrook
DOI:10.1007/s11164-017-3245-4
日期:2018.4
In trying to develop new anticancer agents, a series of quinazolinone and benzamide derivatives were synthesized via reaction of 6-iodo-2-phenyl-4 H -benzoxazin-4-one with nitrogen nucleophiles, namely, formamide, ammonium acetate, hydrazine hydrate, hydroxylamine hydrochloride, substituted aromatic amines, benzyl amine, and/or thiocarbonohydrazide. All compounds were fully characterized by means of
为了开发新的抗癌药,通过6-碘-2-苯基-4 H- 苯并恶嗪-4-酮与氮亲核试剂(甲酰胺,乙酸铵,水合肼)的反应合成了一系列喹唑啉酮和苯甲酰胺衍生物 。盐酸羟胺,取代的芳族胺,苄基胺和/或硫代碳酰肼。所有化合物均通过IR,MS和1 H-NMR光谱进行了全面表征。在体外评估了一些合成的化合物对HePG-2和MCF-7细胞系的抗增殖活性。2-(苯甲酰基氨基) -N- (4-羟苯基)-5-碘代苯甲酰胺和四嗪[1,6-c]喹唑啉-3(4 H )-硫酮衍生物对两种癌细胞的作用最强,与阿霉素相当。大多数合成的化合物还表现出良好的细胞毒性活性。
Synthesis of novel 4,6-disubstituted quinazoline derivatives, their anti-inflammatory and anti-cancer activity (cytotoxic) against U937 leukemia cell lines☆
subsequently cyclised to obtain quinazolones 4, chlorinated 5, then hooked to various optically pure alpha-amino acids to have 4,6-disubstituted quinazoline derivatives 6. All the derivatives 6 are screened for anti-inflammatory and anti-cancer activity against U937 leukemia cell lines. Some of the compounds exhibited promising anti-cancer activity with reference to standard drug Etoposide.
Mechanochemical Synthesis of Substituted 4H-3,1-Benzoxazin-4-ones, 2-Aminobenzoxazin-4-ones, and 2-Amino-4H-3,1-benzothiazin-4-ones Mediated by 2,4,6-Trichloro-1,3,5-triazine and Triphenylphosphine
A mild and convenient approach for the synthesis of 2-substituted 4H-3,1-benzoxazin-4-ones, 2-aminobenzoxazin-4-ones, and 2-amino-4H-3,1-benzothiazin-4-ones under solvent-assisted grinding is reported. In the presence of 2,4,6-trichloro-1,3,5-triazine and catalytic triphenylphosphine, cyclodehydration of N-substituted anthranilic acid derivatives proceeded rapidly within minutes at room temperature
A facile metal-free tandem ring-opening/ring-closing strategy was developed for the synthesis of oxazolines in good to excellent reaction yields under mild reaction conditions. This reaction essentially describes a novel tool for the heterocyclic conversion of benzoxazin-4-ones to 2,5-disubstituted oxazolines directly in one-pot.