Prins-reaktionen mit arylaldehyden, 1. Mitt.: Arylolefine

摘要

Benzaldehyde and substituted benzaldehydes react with styrene (1), α-methylstyrene, (E)-1-propenylbenzene and anethole in presence of sulfuric acid to give 2,4,6-triaryl-1,3-dioxanes. In acetic acid from1and benzaldehyde (1R,3S)-and (1RS,3RS)-1,3-diacetoxy-1,3-diphenylpropane is formed. The relative configuration of the products is determined by means of1H-NMR spectroscopy