Optically Active Helical Lanthanide Complexes: Storable Chiral Lewis Acidic Catalysts for Enantioselective Diels–Alder Reaction of Siloxydienes,Chemistry - An Asian Journal

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Optically Active Helical Lanthanide Complexes: Storable Chiral Lewis Acidic Catalysts for Enantioselective Diels–Alder Reaction of Siloxydienes
Chemistry - An Asian Journal ( IF 3.5 ) Pub Date : 2020-01-22 , DOI: 10.1002/asia.201901705
Shinji Harada _{1,

2} , Saki Nakashima ₁ , Shihori Sekino ₁ , Wakana Oishi ₁ , Atsushi Nishida _{1,

2}

Affiliation

Lanthanide triflates and a series of hexadentate chiral ligand complexes were synthesized. X‐ray‐quality crystals were obtained from mixtures of the lanthanide complexes, which were helical in shape. The complexes showed Lewis acidity and catalyzed the enantioselective Diels–Alder reaction of electron‐rich siloxydienes. The complexes were stable enough to be stored at ambient temperature on a laboratory bench and retained their Lewis acidity even after a month.

中文翻译：

光学活性螺旋镧系元素络合物：可存储的手性路易斯酸性催化剂，用于对映选择性狄尔斯-甲硅烷二烯的Al醛反应

合成了镧系元素三氟甲磺酸酯和一系列六齿手性配体配合物。X射线质量的晶体是从镧系元素络合物的混合物中获得的，这些化合物呈螺旋状。络合物显示路易斯酸度，并催化富电子的甲硅烷氧基二烯的对映选择性Diels-Alder反应。配合物足够稳定，可以在室温下在实验室的工作台上储存，即使一个月后仍保持其路易斯酸度。

更新日期：2020-01-23

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