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基于构象限制策略的β-C-糖苷的高效合成:路易斯酸促进的端基异构位置的硅烷还原反应,具有完全的立体选择性。

An efficient synthesis of beta-C-glycosides based on the conformational restriction strategy: Lewis acid promoted silane reduction of the anomeric position with complete stereoselectivity.

作者信息

Terauchi Masaru, Abe Hiroshi, Matsuda Akira, Shuto Satoshi

机构信息

Graduate School of Pharmaceutical Sciences, Hokkaido University, Kita-12, Nishi-6, Kita-ku, Sapporo 060-0812, Japan.

出版信息

Org Lett. 2004 Oct 14;6(21):3751-4. doi: 10.1021/ol048525+.

DOI:10.1021/ol048525+
PMID:15469340
Abstract

[reaction: see text] The reduction of glyconolactols having an anomeric carbon substituent by Et(3)SiH/TMSOTf proceeded with complete stereoselectivity to produce the corresponding beta-C-glycosides when the substrates were conformationally restricted in the (4)C(1)-chair form by a 3,4-O-cyclic diketal or a 4,6-O-benzylidene protecting group. Thus, the efficient construction of beta-C-glycosides was achieved on the basis of the conformation restriction strategy.

摘要

[反应:见正文] 当底物通过3,4-O-环状二酮或4,6-O-亚苄基保护基团以(4)C(1)-椅式构象受到限制时,用Et(3)SiH/TMSOTf还原具有异头碳取代基的糖醛醇,能以完全的立体选择性生成相应的β-C-糖苷。因此,基于构象限制策略实现了β-C-糖苷的高效构建。

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