The Synthesis of 5-Amino-dihydrobenzo[<i>b</i>]oxepines and 5-Amino-dihydrobenzo[<i>b</i>]azepines via Ichikawa Rearrangement and Ring-Closing Metathesis
The combination of Ichikawa’s rearrangement and a ring-closing metathesis reaction of allyl carbamates is presented as a method for the preparation of 5-amino-substituted 2,5-dihydro-benzo[b]oxepines, 2,5-dihydro-benzo[b]azepines, and 2,5-dihydro-benzo[b]thiepins. It was demonstrated that the use of nonracemic allyl carbamates enables the synthesis of enantioenriched benzo-fused seven-membered heterocycles
市川的重排和烯丙基氨基甲酸酯的闭环复分解反应的组合是作为用于制备5-氨基-取代的2,5-二氢-苯并[方法b ] oxepines,2,5-二氢-苯并[ b ] zepines和2,5-二氢-苯并[ b ]噻吩类。已经证明,使用非外消旋的烯丙基氨基甲酸酯能够合成对映体富集的苯并稠合的七元杂环。最后,显示了所获得结构的进一步功能化允许获得具有药理活性的5-氨基取代的2,3,4,5-四氢-1-苯并[ b ]奥沙平支架。
A novel pathway for the thermolysis of <i>N</i>-nitrosoanthranilates using flash vacuum pyrolysis leading to 7-aminophthalides
作者:Dragan Zlatković、Doris Dallinger、C. Oliver Kappe
DOI:10.1039/d0ob01946a
日期:——
Flashvacuum pyrolysis of methyl N-methyl-N-nitrosoanthranilate leads to elimination of nitric oxide and disproportionation of the formed N-radical to 7-(methylamino)phthalide and methyl N-methylanthranilate. This transformation was found to be a convenient, solvent-free method for the preparation of 7-(methylamino)phthalides. An alternative route through pyrolysis of N-benzyl-N-methyl anthranilates
Recyclable CuO nanoparticles-catalyzed synthesis of novel-2,5-disubstituted 1,3,4-oxadiazoles as antiproliferative, antibacterial, and antifungal agents
作者:M. S. R. Murty、Raju Penthala、Sudheer Kumar Buddana、R. S. Prakasham、Pompi Das、Sowjanya Polepalli、N. Jain、Sreedhar Bojja
DOI:10.1007/s00044-014-1025-x
日期:2014.10
A series of new 2,5-disubstituted 1,3,4-oxadiazoles have been conveniently synthesized through an oxidative C-O coupling by direct C-H bond activation of N-aroyl-N-arylidinehydrazines using a catalytic quantity of CuO nanoparticles. Twenty compounds have been synthesized in good to excellent yields (75-90 %). All the synthesized compounds were evaluated for their in vitro antiproliferative, antibacterial, and antifungal activity. Compounds 8d and 10d are more promising antiproliferative agents with IC50 value of 3.66 and 3.89 A mu M in MCF-7 cell line, and compounds 8a and 10a were showed more potent antifungal activity than standard drug.