Catalyst-directed diastereoselectivity in hydrogenative couplings of acetylene to alpha-chiral aldehydes: formal synthesis of all eight L-hexoses.
Catalyst-directed diastereoselectivity in hydrogenative couplings of acetylene to alpha-chiral aldehydes: formal synthesis of all eight L-hexoses.
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DOI:
10.1021/ol8018874
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发表时间:
2008-09-18
期刊:
影响因子:
5.2
通讯作者:
Krische MJ
中科院分区:
文献类型:
--
作者:
Han SB;Kong JR;Krische MJ
Hydrogenative coupling of acetylene to α-chiral aldehydes 1a–4a using enantiomeric rhodium catalysts ligated by (S)-MeO-BIPHEP and (R)-MeO-BIPHEP delivers the diastereomeric products of carbonyl-(Z)-butadienylation 1b–4b and 1c–4c, respectively, with good to excellent levels of catalyst directed diastereofacial selectivity. Diastereomeric L-glyceraldehyde acetonide adducts 1b and 1c were converted to the four isomeric enoates 6b, 8b, 6c, and 8c, representing a formal synthesis of all eight L-hexoses.
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