Copper-Catalyzed Aerobic Aliphatic C–H Oxygenation Directed by an Amidine Moiety
作者:Yi-Feng Wang、Hui Chen、Xu Zhu、Shunsuke Chiba
DOI:10.1021/ja305833a
日期:2012.7.25
A method for the oxygenation of tertiary C-H bonds of N-alkylamidines and N-(2-alkylaryl)amidines is described that utilizes the CuBr·SMe(2)/2,2'-bipyridine catalytic system under an O(2) atmosphere and provides dihydrooxazoles and 4H-1,3-benzoxazines. The oxygen atom is incorporated from atmospheric molecular oxygen during the present process.
A convenient synthesis of substituted quinolines by thermal or photochemical electrocyclic rearrangement of o-vinyl imidates under non-acidic conditions
作者:Lin Guo Qiang、Neu H Baine
DOI:10.1016/0040-4039(88)85281-x
日期:1988.1
Imidates 4a-e, Table 1, were prepared by treatment of amides3a-e with Et3O+BF4- in the presence of excess Na2HPO4. These underwent smooth rearrangement to quinolines 5a-5e by thermal or photochemical activation.
在过量的Na 2 HPO 4存在下,通过用Et 3 O + BF 4-处理酰胺3a-e来制备表1的酰亚胺化物4a-e。这些通过热或光化学活化而平滑地重排为喹啉5a-5e。
A convenient synthesis of substituted quinolines by thermal electrocyclic rearrangement of o-vinyl anils under nonacidic conditions
作者:Lin Guo Qiang、Neil H. Baine
DOI:10.1021/jo00253a011
日期:1988.9
A Novel Approach to the Synthesis of 4H-3,1-Benzoxazines
作者:B. Hajjem、A. Chihi、B. Baccar
DOI:10.1080/00397919208021306
日期:1992.1
Imidates of type 1 react with organometallic reagents to give 4H-3,1-benzoxazines 2 in good yield. Synthetic Considerations and Spectroscopic details are discussed.
Synthesis of Benzoxazines, 3,4-Dihydroquinazolines and Quinazolinethiones
作者:M. L. ElEfrit、B. Hajjem、H. Zantour、B. Baccar
DOI:10.1080/00397919608004625
日期:1996.9
Reaction of aldehydes, ketones, imines and isothiocyanates with N-(2-bromophenyl) ethylimidates la in presence of lithium, is considered as an original route to 4H-3, 1-benzoxazines, 3,4-dihydroquinazolines and 4(3H)-quinazolinethiones.