Journal
CHEMCATCHEM
Volume 6, Issue 1, Pages 109-112Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/cctc.201300717
Keywords
alcohols; dehydrogenation; homogeneous catalysis; iridium; lactones
Categories
Funding
- KAKENHI [19750075, 25105732]
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A new catalytic system for the dehydrogenative lactonization of a variety of benzylic and aliphatic diols in aqueous media was developed. By using a water-soluble, dicationic iridium catalyst bearing 6,6-dihydroxy-2,2-bipyridine as a functional ligand, highly atom economical and environmentally benign synthesis of various lactones was achieved in good to excellent yields. Recovery and reuse of the catalyst were also accomplished by a simple phase separation and the recovered catalyst maintained its high activity at least until the fifth run.
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