One-Pot, Highly Regioselective 1,3-Dipole Cycloaddition Promoted by Montmorillonite for the Synthesis of Spiro[indole-pyrrolizine], Spiro[indole-indolizine], and Spiro[indole-pyrrolidine] gem-Bisphosphonates
作者:Mingshu Wu、Guozhu Li、Fengjiao Liu、Jie Jiang
DOI:10.1055/s-0035-1560463
日期:——
montmorillonite. The one-pot reactions proceeded by 1,3-dipole cycloadditions of azomethine ylides formed in a decarboxylative manner. The proposed mechanism is in line with experimental data that confirmed that the azomethine ylide is formed in a decarboxylative manner; this provides new insight into the underlying mechanisms of such cycloadditions. The method has many notable features, such as a broad substrate
摘要 通过在蒙脱石存在下,靛红,亚乙基双(膦酸)乙酯与氨基酸之间的多组分反应,制备了各种螺[吲哚-吡咯嗪],螺[吲哚-吲哚嗪]和螺[吲哚-吡咯烷]宝石-双膦酸酯。一锅反应是通过以脱羧方式形成的偶氮甲亚胺的1,3-偶极环加成反应进行的。所提出的机理与实验数据相符,实验数据证实了甲亚胺叶立德是以脱羧方式形成的。这为这种环加成的潜在机理提供了新的见解。该方法具有许多显着的特征,例如广泛的底物范围,高效率和高区域选择性。 通过在蒙脱石存在下,靛红,亚乙基双(膦酸)乙酯与氨基酸之间的多组分反应,制备了各种螺[吲哚-吡咯嗪],螺[吲哚-吲哚嗪]和螺[吲哚-吡咯烷]宝石-双膦酸酯。一锅反应是通过以脱羧方式形成的偶氮甲亚胺的1,3-偶极环加成反应进行的。所提出的机理与实验数据相符,实验数据证实了甲亚胺叶立德是以脱羧方式形成的。这为这种环加成的潜在机理提供了新的见解。该方法具有许多显着的特征,例如广泛的底物范围,高效率和高区域选择性。