Figure 1.
Pathways for 1,3-allylic rearrangement/Schmidt reactions of (a) 1c and 1d (or substituted cyclohexanones bearing an equatorial side chain, like 7a) and (b) 9c and 9d. In (a), the numbers in parentheses indicate calculated energies for transition state structures from the indicated intermediate to the corresponding LA-complexed lactam product (CPCM(DCM)-B3LYP/6-31G(d,p)[SDD for Sn], relative to the lowest energy transition state structure). (c) Disfavored intermediates from isomers of 11. Proposed intermediates from (d) isomers of 13 or (e) isomers of 19.