The Reaction of Nitrones with Cyclopropanes: A Convenient Preparation of Tetrahydro-1,2-oxazines
作者:Michael Kerr、Cheryl Carson、Ian Young
DOI:10.1055/s-2007-990864
日期:2008.2
undergo smooth reaction in the presence of ytterbium(III) triflate to form tetrahydro-1,2-oxazines with a high degree of regio- and stereocontrol. A three-component protocol has also been developed wherein the nitrone is generated in situ from an aldehyde and a hydroxylamine. The reactions are often high yielding with broad substrate scope. The multicomponent nature of the reaction makes it amenable
Nitrones 和 dialkyl cyclopropane-1,1-dicarboxylates 在三氟甲磺酸镱 (III) 的存在下进行平稳反应,形成具有高度区域和立体控制的四氢 1,2-恶嗪。还开发了一种三组分方案,其中硝酮由醛和羟胺原位生成。该反应通常具有高产率和广泛的底物范围。该反应的多组分性质使其适用于化合物库的合成,并且还允许在面向目标的合成中开发高度收敛的策略。