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
[4+2] cycloaddition reactions of various 1,3-diaza-1.3-Butadienes with ketenes
作者:Sujit N. Mazumdar、Mohinder P. Mahajan
DOI:10.1016/s0040-4020(01)86423-1
日期:1991.1
[4+2] cycloaddition reactions of 1-aryl-4-dimethylainino-1,3-diaza-1, 3-butadienes (), 1 -aryl-4-dimethylamino-2-methylthio-1, 3-diaza-1, 3-butadienes (), 1-aryl-4-methylthio-2-phenyl-4-sec. amino-1, 3-diaza-1, 3-butadienes () and 4, 4-bis(sec.amino)-1,2-diphenyl-1, 3-diaza-1, 3-butadienes () with monophenyiketene and similar cycloaddition reactions of , and with monochloroketene are described.