Synthesis of a triangulene ring system and derivatives thereof
US11236029B2 · kind B2 · utility
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Key dates
| Filing date | May 18, 2020 |
| Grant date | Feb 1, 2022 |
| Priority date | — |
| Expiry date | May 18, 2040 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C2603/54
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
A three step synthesis of the 8,12-dihydro-4H-dibenzo[cd,mn]pyren-3a2-ylium cation (triangulenium cation) is effected by cascade cyclization of a tetra-benzyl alcohol precursor in triflic acid solution. This cation is easily observed by NMR and optical spectroscopy. Quenching of the cation into basic solutions or by hydride transfer from triethylsilane provides access to stable dihydro and tetrahydro[3]triangulenes. This route makes several [3]triangulene precursors more readily available for development of new applications in the field of molecular electronics.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.