Asymmetric Synthesis of 2-Substituted 5-, 6- and 7-Membered Nitrogen Heterocycles by Oxime Addition Ring-Closing Metathesis.

Ring closing metathesis reactions of the dienes 6 and 9 leads to the nitrogen heterocycles 7 and 10, respectively, one of which 10c was converted into (R)-(−)-coniine.