1-Phenyl-1,2-cyclohexadiene: Astoundingly High Enantioselectivities on Generation in a Doering-Moore-Skattebøl Reaction and Interception by Activated Olefins
from (−)‐5 and was enantiospecifically intercepted to give the product. In the case of indene as trap for (M)‐7, the (−)‐ and the (+)‐enantiomer of the [2+2] cycloadduct were formed in the ratio of 95:5. Highly surprising, remarkable enantioselectivities were also observed, when (M)‐7 was trapped with styrene to furnish two diastereomeric [2+2] cycloadducts. Hence, the achiral conformation of the diradical