Volume 56, Issue 12 pp. 3344-3348
Communication

Intramolecular Amido Transfer Leading to Structurally Diverse Nitrogen-Containing Macrocycles

Heejeong Kim

Heejeong Kim

Department of Chemistry, Korea Advanced Institute of Science and Technology (KAIST), Daejeon, 34141 Republic of Korea

Center for Catalytic Hydrocarbon Functionalization, Institute for Basic Science (IBS), Daejeon, 34141 Republic of Korea

Search for more papers by this author
Prof. Dr. Sukbok Chang

Corresponding Author

Prof. Dr. Sukbok Chang

Department of Chemistry, Korea Advanced Institute of Science and Technology (KAIST), Daejeon, 34141 Republic of Korea

Center for Catalytic Hydrocarbon Functionalization, Institute for Basic Science (IBS), Daejeon, 34141 Republic of Korea

Search for more papers by this author
First published: 10 February 2017
Citations: 26

Graphical Abstract

Azamacrocycles: A rhodium-catalyzed inner-sphere intramolecular C−H amination of tailormade acetophenone ketoximes tethered with either aryl or alkyl azides furnishes azamacrocyclic compounds with up to 36-membered rings. While substrates bearing aryl azides underwent a monomeric ring formation in high yields, a dimeric double cyclization took place exclusively with alkyl-azide-tethered ketoximes.

Abstract

Reported herein is the development of rhodium-catalyzed intramolecular amido transfer as an efficient route to nitrogen-containing macrocycles starting from acetophenone ketoximes tethered with either aryl or alkyl azides. Facile generation of rhodacycles and metal imido intermediates was the key to success in this mechanistic scaffold to represent the first example of an intramolecular inner-sphere C−H amination. While substrates bearing aryl azides underwent a monomeric ring formation in high yields, a dimeric double cyclization took place exclusively with alkyl-azide-tethered ketoximes, thus affording up to 36-membered azamacrocyclic products.

The full text of this article hosted at iucr.org is unavailable due to technical difficulties.