108228-39-3Relevant academic research and scientific papers
[4+2] Cycloaddition reactions of various 1,3-diaza-1.3-butadienes with ketenes
Mazumdar, Sujit N.,Mahajan, Mohinder P.
, p. 1473 - 1484 (2007/10/02)
[4+2] cycloaddition reactions of 1-aryl-4-dimethylainino-1,3-diaza-1, 3-butadienes (I), 1 -aryl-4-dimethylamino-2-methylthio-1, 3-diaza-1, 3-butadienes (5), 1-aryl-4-methylthio-2-phenyl-4-sec. amino-1, 3-diaza-1, 3-butadienes (9) and 4, 4-bis(sec.amino)-1
N-[[(chlorosulfinyl)oxy]methylene]-N-methylmethanaminium chloride as a dehydrating agent. A direct and efficient one-pot synthesis of various pyrimidinones, azetidinones and pyridones via cycloaddition reactions
Singh,Mahajan,Prajapati,Sandhu
, p. 1026 - 1028 (2007/10/02)
N-[[(Chlorosulfinyl)oxy]methylene]-N-methylmethanaminium chloride (1) is found to be an efficient and mild dehydrating agent for the in situ generation of monophenyl- (4a) diphenyl- (4b) and monochloroketenes (4c) directly from the corresponding carboxylic acids 2. These ketenes undergo cycloaddition reactions with 1,3-diaza-1,3-butadienes 5 to afford 4(3H)-pyrimidinones 6 and azetidones 7, and with 3-(aryliminomethyl)chromones 8 to give [1]benzopyrano[3,2-c]pyridine-3,10[2H]diones 9.
DIELS-ALDER CYCLOADDITION REACTIONS OF 1,3-DIAZABUTADIENES WITH KETENES
Mazumdar, Sujit Nandy,Ibnusaud, Ibrahim,Mahajan, Mohinder Pal
, p. 5875 - 5876 (2007/10/02)
Diels-Alder cycloaddition reactions of 1-aryl-4-dimethylamino-2-phenyl-1,3-diazabutadienes with monophenyl and diphenylketenes, resulting in high yields of pyrimidin-6-one derivatives are reported.
