期刊
ORGANIC & BIOMOLECULAR CHEMISTRY
卷 10, 期 8, 页码 1625-1638出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c1ob06683h
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资金
- National Science Council of the Republic of China [NSC 97-2113-M-259-002-MY3]
A series of Schiff base ligands were synthesized from (1R)-camphor. Under the optimal conditions, (+)-SBAIB-a, 10 was found to be an excellent catalyst for the enantioselective addition of phenylacetylene to various aldehydes without utilizing either achiral additives or Ti((OPr)-Pr-i)(4). This approach yielded (R)-propargylic alcohols in extremely high yields (up to 99%) and excellent enantioselectivities (up to 92%). The corresponding (S)-propargylic alcohols were synthesized in good to high enantioselectivities (up to 91%) and excellent yields (up to 99%) using (-)-SBAIB-a, 41.
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