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手性镱配合物催化的直接不对称羟醛-蒂什琴科反应:反式-1,3-二醇的合成

Chiral ytterbium complex-catalyzed direct asymmetric aldol-Tishchenko reaction: synthesis of anti-1,3-diols.

作者信息

Mlynarski Jacek, Rakiel Bartosz, Stodulski Maciej, Suszczyńska Agata, Frelek Jadwiga

机构信息

Institute of Organic Chemistry, Polish Academy of Sciences, Kasprzaka 44/52, 01-224 Warsaw, Poland.

出版信息

Chemistry. 2006 Oct 25;12(31):8158-67. doi: 10.1002/chem.200600357.

Abstract

The asymmetric aldol-Tishchenko reaction of aromatic aldehydes with aliphatic and aromatic ketones has been developed as an efficient strategy for the synthesis of anti-1,3-diols in good yield with high diastereocontrol and good levels of enantioselectivity. This domino-type reaction is catalyzed by a chiral ytterbium complex that promotes both the aldol reaction through enolization of the carbonyl compound and the Evans-Tishchenko reduction of the aldol intermediate. The stereochemistry of the resulting diols is also investigated and finally proved by using CD techniques.

摘要

芳香醛与脂肪族和芳香族酮的不对称羟醛-蒂什琴科反应已被开发为一种有效的合成策略,可高产率地合成反式-1,3-二醇,具有高非对映选择性和良好的对映选择性。这种多米诺型反应由手性镱配合物催化,该配合物通过羰基化合物的烯醇化促进羟醛反应以及羟醛中间体的埃文斯-蒂什琴科还原反应。还对所得二醇的立体化学进行了研究,并最终通过圆二色光谱(CD)技术得以证实。

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