Improving Carbene–Copper-Catalyzed Asymmetric Synthesis of α-Aminoboronic Esters Using Benzimidazole-Based Precursors
摘要:
By using a benzimidazole core and N-substitutions to tune the electronic properties of the corresponding N-heterocyclic carbenes, a one-pot protocol for efficient synthesis of alpha-aminoboronic esters without the need of a glovebox was developed in this work. The starting materials for the transformation can also be extended from aldehydes to ketones. An alternative protocol with short reaction time using preformed carbene-copper chloride is also described.
Facial and practical synthesis of benzimidazole-based N-heterocyclic carbenes
作者:Han Wang、Yuyu Xia、Shang Lv、Jingli Xu、Zhihua Sun
DOI:10.1016/j.tetlet.2013.02.006
日期:2013.4
An efficient synthesis of benzimidazole-based N-heterocyclic carbenes has been developed. The key step in this synthetic methodology was a one-pot protocol for the synthesis of N,N'-diarylaryldiamines starting from aryldiamine and aryl halides. (C) 2013 Elsevier Ltd. All rights reserved.
Improving Carbene–Copper-Catalyzed Asymmetric Synthesis of α-Aminoboronic Esters Using Benzimidazole-Based Precursors
作者:Kun Wen、Han Wang、Jinbo Chen、He Zhang、Xiaodan Cui、Chao Wei、Erkang Fan、Zhihua Sun
DOI:10.1021/jo4000477
日期:2013.4.5
By using a benzimidazole core and N-substitutions to tune the electronic properties of the corresponding N-heterocyclic carbenes, a one-pot protocol for efficient synthesis of alpha-aminoboronic esters without the need of a glovebox was developed in this work. The starting materials for the transformation can also be extended from aldehydes to ketones. An alternative protocol with short reaction time using preformed carbene-copper chloride is also described.