Asymmetric Hosomi - Sakurai Reaction of Allylsilanes Containing Arabinose-Derived Alcohols as Chiral Auxiliaries

Tony K.M. Shing, Lian Hai Li

研究成果: Article査読

19 被引用数 (Scopus)

抄録

Five enantiopure allylsilanes la-e have been prepared, with arabinose-derived alcohols methyl and benzyl 3,4-O-isopropylidene- and 3,4-O-methylene-β-L-arabinopyranosides as chiral auxiliaries, and subjected to the asymmetric Hosomi - Sakurai reaction. The effect of Lewis acid on the stereochemical outcome of the reaction was investigated, and BF3 was found to exhibit higher enantioselectivity than that of SnCl4 or TiCl4. The reaction of benzyl 2-O-(allyldimethylsilyl)-3,4-O-isopropylidene-β-L-arabinopyranoside (1b) with n-decanal gave the highest ee (45%) in the presence of BF3. The steric effect of the chiral auxiliary on the asymmetric Hosomi-Sakurai reaction is demonstrated for the first time although the stereogenic center is remote from the reaction site.

本文言語English
ページ(範囲)1230-1233
ページ数4
ジャーナルJournal of Organic Chemistry
62
5
DOI
出版ステータスPublished - 1997

ASJC Scopus subject areas

  • Organic Chemistry

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