Gupta R, Cabreros TA, Muller G, Bedekar AV. Enantiomerically Pure 5,13-Dicyano-9-oxa[7]helicene: Synthesis and Study.
European J Org Chem 2018;
2018:5397-5405. [PMID:
30853851 PMCID:
PMC6402497 DOI:
10.1002/ejoc.201800922]
[Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2018] [Indexed: 11/10/2022]
Abstract
Optically pure dicyano oxa[7]helicenes and helicene-like molecules have been prepared and investigated for their optical behavior. The isomers of the intermediate 4,4'-biphen-anthrene-3,3'-diol were resolved by physically separating their 1-menthyl carbonate derivatives. In this work a mild method was developed to cleave ArOMe in presence of a cyano group. The optical rotation of atropisomeric diol, helicenes-like compounds and the oxa[7]helicenes was observed to be in increasing order, while the molecules also showed good response to circularly polarized luminescence.
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