Synthesis and structural aspects of N-triflylphosphoramides and their calcium salts'highly acidic and effective Br?nsted acids

Rueping M.; Nachtsheim B.J.; Koenigs R.M.; Ieawsuwan W.

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Synthesis and structural aspects of N-triflylphosphoramides and their calcium salts'highly acidic and effective Br?nsted acids

机译：N-三氟磷酰胺及其钙盐的高酸性有效布朗斯台德酸的合成和结构方面

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Recently, 1,1′-bi-2-naphthol (BINOL)-based N-triflylphosphoramides emerged as a new class of potent Br?nsted acid catalysts. In this paper we describe the efficient synthesis of various BINOL-based N- triflylphosphoramides and their calcium salts. Furthermore, X-ray crystal structure analysis combined with energy-dispersive X-ray spectroscopy (EDX) measurements confirmed that the synthesised chiral N-triflylphosphoramides are highly acidic metal-free catalysts. Freedom! The synthesis and structure determination of various 1,1′-bi-2-naphthol (BINOL)-based N-triflylphosphoramides and their corresponding calcium salts is presented. A simple acidic treatment of the calcium salts provides the metal-free Br?nsted acids (see scheme; Tf=trifluoromethanesulfonyl).

机译：最近，基于1,1'-联-2-萘酚（BINOL）的N-三氟磷酰胺已成为一类新型的布朗斯台德强酸催化剂。在本文中，我们描述了各种基于BINOL的N-三氟磷酰胺及其钙盐的有效合成。此外，X射线晶体结构分析与能量色散X射线光谱（EDX）测量相结合证实，合成的手性N-三氟磷酰胺是高度酸性的无金属催化剂。自由！介绍了各种基于1,1'-联-2-萘酚（BINOL）的N-三氟磷酰胺及其相应的钙盐的合成和结构测定。钙盐的简单酸性处理可提供不含金属的布朗斯台德酸（请参阅方案; Tf =三氟甲磺酰基）。

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《Chemistry: A European journal》 |2010年第44期|共11页
作者
Rueping M.; Nachtsheim B.J.; Koenigs R.M.; Ieawsuwan W.;
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正文语种 eng
中图分类应用化学;
关键词
asymmetric synthesis; Br?nsted acids; calcium; homogeneous catalysis; reaction mechanisms;

机译：不对称合成;布朗斯台德酸;钙;均相催化;反应机理;

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1. Synthesis and structural aspects of N-triflylphosphoramides and their calcium salts'highly acidic and effective Br?nsted acids [J] . Rueping M., Nachtsheim B.J., Koenigs R.M., Chemistry: A European journal . 2010,第44期

机译：N-三氟磷酰胺及其钙盐的高酸性有效布朗斯台德酸的合成和结构方面
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Synthesis and structural aspects of N-triflylphosphoramides and their calcium salts'highly acidic and effective Br?nsted acids

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