The intermediate of “α-cyclisation of tertiary amines” as a vinyl-1,3-dipole
摘要:
Captodative alpha-cyano-enamines react at room temperature with DMAD via [2+2] cycloaddition and cycloreversion to dienamines 1. These can be isolated or cyclise above 80-130 degrees C. At these temperatures, they can also react as vinyl-1,3-dipoles as shown by cycloaddition to acrylonitrile or N-phenyl-maleimide. (C) 1997 Elsevier Science Ltd. All rights reserved.
The intermediate of “α-cyclisation of tertiary amines” as a vinyl-1,3-dipole
摘要:
Captodative alpha-cyano-enamines react at room temperature with DMAD via [2+2] cycloaddition and cycloreversion to dienamines 1. These can be isolated or cyclise above 80-130 degrees C. At these temperatures, they can also react as vinyl-1,3-dipoles as shown by cycloaddition to acrylonitrile or N-phenyl-maleimide. (C) 1997 Elsevier Science Ltd. All rights reserved.