Cover Feature: Fusing Carborane Carboxylic Acids with Alkynes: 3D Analogues of Isocoumarins via Regioselective B−H Activation (Chem. Eur. J. 3/2018). Issue 3 (2nd November 2017)

• Record Type: Journal Article
• Authors: Lin, Furong; Shen, Yunjun; Zhang, Yuanbin; Sun, Yuji; Liu, Jiyong; Duttwyler, Simon
• Is Part Of: Chemistry. Volume 24:Issue 3(2018)
• Page Start: 506
• Page End: 506
• Publication Date: 2017-11-02
• Subjects: annulation -- B−H activation -- carborane -- iridium catalysis -- isocoumarin; Chemistry -- Periodicals; 540
• DOI: 10.1002/chem.201704733
• Languages: English
• ISSNs: 0947-6539

Abstract

Abstract : The preparation of a new class of heterocycles is reported. Fusion of carborane carboxylic acids with alkynes leads to three‐dimensional bora‐analogues of isocoumarins. The procedure relies on an iridium‐catalyzed alkenylation/annulation sequence between monocarba‐ closo ‐dodecaborate clusters and diarylacetylenes. Regioselective B−H activation, followed by B−C bond formation and ring closure, affords the fused cyclized products. More information can be found in the Communication by S. Duttwyler et al. onpage 551 .