期刊
TETRAHEDRON-ASYMMETRY
卷 20, 期 21, 页码 2474-2478出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.tetasy.2009.10.005
关键词
-
资金
- National Natural Science Foundation of China [20672083, 20872115]
Sterically hindered C-2 chiral (3R,4R)- and (3S,4S)-2,2,5,5-tetraphenyltetrahydrofuran-3,4-diols have been conveniently prepared in a very high yield via heterogeneous intramolecular selective 1,4-cyclocondensation of (2R,3R)- and (2S,3S)-1,1,4,4-tetraphenylbutanetetraol in concentrated hydrohalic acids, respectively. Preliminary examination of additives for the Barbas-List reaction showed that in certain cases, the hindered C-2 chiral tetrahydrofuran-3,4-diols were better chiral auxiliaries than enantiopure (R)- and (S)-1,1'-bi-2-naphthols. (C) 2009 Elsevier Ltd. All rights reserved.
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