2-イソオキサゾリンの化学の最近の進歩 : -選択性の観点から-

概要

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2-Isoxazolines (4, 5-dihydroisoxazoles) are recognized as useful intermediates in organic synthesis. The synthetic utilites of them are as follows : Firstly, they are readily prepared via an inter- or an intramolecular 1, 3-dipolar cycloaddition of nitrile oxides. Secondly, they can be converted into various important synthetic units such as β-hydroxy ketones or γ-amino alcohols. The isoxazoline strategy can be regarded as an aldol alternative strategy for construction of aliphatic and alicyclic compounds. In this review, recent development of the chemistry of 2-isoxazoline is described. I focus my attention to the following three topics : the stereo- and regiochemical course of the intermolecular 1, 3-dipolar cycloaddition reaction of nitrile oxides, the stereochemical course of intramolecular 1, 3-dipolar cycloaddition of nitrile oxides, and the stereoselective constructionof side chains of 2-isoxazolines.