Ruthenium catalyzed chemo and site-selective C–H amidation of oxobenzoxazine derivatives with sulfonyl azides
作者:Manickam Bakthadoss、Polu Vijay Kumar、Ravan Kumar、Manickam Surendar、Duddu S. Sharada
DOI:10.1039/c9nj02452b
日期:——
A novel and general protocol towards the synthesis of highly functionalized ortho-amido oxobenzoxazine frameworks via ruthenium catalyzed intermolecular C–H amidation using sulfonyl azides as amidation components has been developed for the first time.
Selective Oxidative Decarbonylative Cleavage of Unstrained C(<i>sp</i><sup>3</sup>)–C(<i>sp</i><sup>2</sup>) Bond: Synthesis of Substituted Benzoxazinones
作者:Ajay Verma、Sangit Kumar
DOI:10.1021/acs.orglett.6b02142
日期:2016.9.2
A transition metal (TM)-free practical synthesis of biologically relevant benzoxazinones has been established via a selective oxidative decarbonylative cleavage of an unstrained C(sp3)–C(sp2) bond employing iodine, sodium bicarbonate, and tbutyl hydroperoxide in DMSO at 95 °C. Control experiments and Density Functional Theory (DFT) calculations suggest that the reaction involves a [1,5]H shift and
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
Synthesis of 2-substituted-4H-3,1-benzoxazin-4-ones
作者:D. I. Bain、R. K. Smalley
DOI:10.1039/j39680001593
日期:——
yield. With 1 mol. of benzoyl chloride, however, a mixture of benzoxazinone and N-benzoylanthranilic acid was obtained. The mechanism of the reaction has been investigated and various 2-substituted-4H-3,1-benzoxazin-4-ones have been prepared and their u.v. spectra recorded.
邻氨基苯甲酸(1摩尔)在吡啶溶液中与苯甲酰氯(2摩尔)反应,以高收率得到2-苯基-4 H -3,1-苯并恶嗪-4-酮。与1摩尔。然而,得到了苯甲酰氯的苯并恶嗪酮和N-苯并氰基邻氨基苯甲酸的混合物。已经研究了反应的机理,并制备了各种2-取代的-4 H -3,1-苯并恶嗪-4-酮,并记录了它们的uv光谱。
Synthesis and Antimicrobial Activity of 2-Aryl-4H-3,1-benzoxazin-4-ones
作者:Zulfiqar Ali Khan、Syed Ali Raza Naqvi、Sohail Anjum Shahzad、Nasir Mahmood、Muhammad Yar、Ameer Fawad Zahoor
DOI:10.14233/ajchem.2013.12846
日期:——
1-benzoxazin-4-one as high density lipoprotein elevators for the treatment of patients suffering from hyperlipoproteinemia and associated diseases. Beside of their Synthesis and AntimicrobialActivity of 2-Aryl-4H-3,1-benzoxazin-4-ones