The invention provides a macrocyclic compound of Formula (I): wherein each R1is independently an aromatic ring system that is optionally substituted, and wherein n is an integer of from 2 to 50.
We herein establish a multicomponent annulation method for the synthesis of valuable iminocoumarins using aryl thiocarbamates, internal alkynes, and sulfonamides as starting materials, which are safe and readily available. The key step is a Rh-catalyzed and sulfur-directed C—H bondactivation. Preliminary mechanistic investigations suggested that the nucleophilic attack of the sulfonamide on an active