https://lw6inhibitor.com/dextr....an-sulphate-induced-
Expanded helicenes are required showing enhanced chiroptical properties as compared to the ancient helicenes but the synthesis is quite challenging. Herein, we report the facile synthesis of a series of expanded helicenes Hn (n=1-4) containing 11, 19, 27 and 35 cata-fused benzene bands through Suzuki coupling-based oligomerization followed by Bi(OTf)3 -mediated regioselective cyclization of plastic ethers. Their structures were decided by X-ray crystallographic anal
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