Highly Diastereoselective Simmons−Smith Cyclopropanation of Allylic Amines
摘要:
Cyclopropanation of allylic tertiary amines using the Simmons-Smith reagent has been achieved by employing chelating groups in close proximity to the amine. The chelating groups promote cyclopropa nation at the expense of N-ylide formation. Using pseudoephedrine as the chelating group, high diastereoselectivity is observed.
Highly Diastereoselective Simmons−Smith Cyclopropanation of Allylic Amines
摘要:
Cyclopropanation of allylic tertiary amines using the Simmons-Smith reagent has been achieved by employing chelating groups in close proximity to the amine. The chelating groups promote cyclopropa nation at the expense of N-ylide formation. Using pseudoephedrine as the chelating group, high diastereoselectivity is observed.