期刊
ARKIVOC
卷 -, 期 -, 页码 41-54出版社
ARKAT USA INC
DOI: 10.24820/ark.5550190.p011.746
关键词
Chemosensor ligands; N-arylation; P-ligand; Buchwald-Hartwig amination; microwave; ionophores
资金
- National Research, Development and Innovation Fund of Hungary [NVKP-16 (1-2016-0043), KFI-16 (1-2016-0177), KFI-18 (00097), SNN 135825, OTKA PD128612, VKE-18 (00032)]
- Bolyai Research Scholarship of the Hungarian Academy of Sciences, the UNKP-21-5 new National Excellence Program [BO/799/21/7, BO/00248/19/7]
8-Aminoquinoline-2-carbaldehydes are useful building blocks for ion sensors, and a general method for their preparation starting from commercially available 8-bromo-2-methylquinoline is presented. Different sidechains were introduced to fine-tune their affinity and selectivity, and an alternative method is proposed to overcome the limitation of high catalyst affinity.
8-Aminoquinolines are useful molecular motifs for ion sensors. To encourage chemosensor development, new building blocks containing these motifs are essential. 8-Aminoquinoline-2-carbaldehydes are proposed as useful building blocks since their aldehyde group offers the possibility for further transformations. We present a general method for the preparation of these compounds starting from commercially available 8-bromo-2-methylquinoline. Different sidechains for fine-tuning their affinity and selectivity were introduced by a microwave-aided N-arylation using Pd(0) and P-ligands; the desired products were achieved by oxidation. An alternative method is also presented when the product shows high affinity towards the catalyst limiting the effectiveness of the Pd-catalysed the N-arylation. [GRAPHICS]
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