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Updated: Jun 11, 2026

Preparation of a Corannulene-functionalized Hexahelicene by Copper(I)-catalyzed Alkyne-azide Cycloaddition of Nonplanar Polyaromatic Units
Published on: September 18, 2016
Base-Promoted Cascade Double Heteroannulation of 2-Hydroxychalcones with Elemental Sulfur: An Approach to
Behnaz Farajpour1,2,3, Nafiseh Bakhshi Davoudi3, Azizollah Habibi1,2
1Faculty of Chemistry, Kharazmi University, Daneshgah Square, Shahid Beheshti Street, Karaj 3197937551, Iran.
Abstract:
Herein, we develop a fascinating strategy for synthesizing novel 2-aryl-9λ4-benzo[d][1,2]oxathiolo[2,3-b][1,2]oxathioles via a base-promoted cascade reaction of 2-hydroxychalcones and elemental sulfur under simple heating conditions. This innovative one-pot process provides a straightforward synthetic platform for the concomitant formation of one C═S bond, two S-O bonds, and two fused heterocyclic rings with excellent atom and step efficiency. Simple, inexpensive, and readily available starting materials, operational simplicity, acceptable functional group tolerance, scalability, synthetically useful yields, and attractive product structures are some other highlighted features of this transformation.
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