87681-11-6Relevant articles and documents
Asymmetric Induction in the Intramolecular 1,3-Diyl Trapping Reaction through the Use of Menthyl and 8-Phenylmenthyl Esters. An Unexpected Result
Little, R. Daniel,Moeller, Kevin D.
, p. 4487 - 4492 (2007/10/02)
Diazenes 4a and 4b bearing (-)-menthyl and (-)-8-phenylmenthyl ester units as chiral auxiliaries were prepared and converted into the linearly fused tricyclopentanoid ring system through utilization of the intramolecular 1,3-diyl trapping reaction.The idealized transition state representations 4a and 4b were shown to be inadequate, for while they were useful in predicting the observed decrease in the cis,anti to cis,syn ring-fusion product ratio as the size of the ester unit increased, they provided an overly simplified view of the expectations associated with asymmetric induction.In no instance was a synthetically useful de value obtained.A brief mechanistic rationale which focuses upon the presumed stepwise nature of the trapping reaction is presented.