Journal
AUSTRALIAN JOURNAL OF CHEMISTRY
Volume 64, Issue 11, Pages 1458-1465Publisher
CSIRO PUBLISHING
DOI: 10.1071/CH11301
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Funding
- JSPS.KAKENHI [20245022, 23350039]
- NEDO
- MEXT
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Bifunctional Bronsted base-assisted boronic acid catalysts, arylboronic acids bearing two sterically bulky (N,N-dialkylamino)methyl groups at the 2,6-positions, exhibit remarkable activities for the dehydrative intramolecular condensation of dicarboxylic acids. The steric bulkiness of the (N,N-dialkylamino) methyl groups of 1, which prevents the formation of less active species such as the N -> B chelated species and triarylboroxines 3, is crucial for the high catalytic activity. This is the first successful method for the catalytic dehydrative self-condensation of di- and tetracarboxylic acids.
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