Preparation and Diels–Alder reaction of carbosilane dendrimer with conjugated diene

The carbosilane dendrimers with 12, 36, 108 and 324 diene groups on the periphery have been prepared. The first generation with 12 diene groups which react with enes such as N-ethylmaleimide, 1,4-naphtoquinone, and tetracyanoethene has produced the Diels–Alder products (DA) on the dendritic periphery. The NMR and MALDI-TOF mass spectra have characterized the DA products. The unified dendritic character has been observed by gel permeation chromatography.