Brønsted Acid-Catalyzed Straightforward Synthesis of Benzo[b]carbazoles from 2,3-Unsubstituted Indoles

Described is a general and efficient synthesis of valuable benzo[b]carbazoles by Brønsted acid-catalyzed reactions between simple C-2,C-3-unsubstituted indoles and ortho-[α-(hydroxy)benzyl]benzaldehyde acetals. Highly selective migration processes are involved as key steps in the overall cascade sequence that involves the one-pot formation of two new bonds and a cycle in a regioselective fashion.Ministerio de Economia y Competitividad (MINECO) and FEDER (CTQ2010-15358) for financial suuport. P. G.-G. and M.A.F.-R. thank MINECO for "Juan de la Cierva" and "Ramon y Cajal" contractsThis is the peer reviewed version of the following article: Suárez, A., García-García, P., Fernández-Rodríguez, M. A. and Sanz, R. (2014), Brønsted Acid-Catalyzed Straightforward Synthesis of Benzo[b]carbazoles from 2,3-Unsubstituted Indoles. Adv. Synth. Catal., 356: 374–382. doi: 10.1002/adsc.201300868, which has been published in final form at 10.1002/adsc.201300868. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Self-Archiving

Synthesis and characterisation of novel nopyl-derived phosphonium ionic liquids

A series of novel nopyl-derived chiral phosphonium ionic liquids have been successfully synthesised and characterised. Analysis of each novel ionic liquid was conducted in order to confirm structure, purity and thermal stability