Studies on a Novel Type of B(C6F5)3 and Aromatic Ammonium ChlorideSystem

doi:10.6023/A15070459

Acta Chim. Sinica ›› 2015, Vol. 73 ›› Issue (11): 1203-1206.DOI: 10.6023/A15070459 Previous Articles Next Articles

Article

新型B(C₆F₅)₃/芳香胺盐酸盐体系的应用研究

田冲, 姜亚, Borzov Maxim, 聂万丽

天然产物与小分子合成四川省高校重点实验室乐山师范学院化学学院乐山 614000

投稿日期:2015-07-04 发布日期:2015-08-18
通讯作者: 聂万丽 E-mail:niewl126@126.com
基金资助:
项目受四川省教育厅资助科研项目(No. 15ZA0279)和乐山市科技计划项目(No. 14GZD010)资助.

Studies on a Novel Type of B(C₆F₅)₃ and Aromatic Ammonium ChlorideSystem

Tian Chong, Jiang Ya, Borzov Maxim, Nie Wanli

Sichuan Province Key Laboratory of Natural Products and Small Molecule Synthesis, Chemical Department of LeshanNormal University, Leshan 614000

Received:2015-07-04 Published:2015-08-18
Supported by:
Project support by the Foundation of Sichuan Provincial Department of Education (No. 15ZA0279), Foundation of Leshan Science and Technology plan (No. 14GZD010)

Although in recent years the frustrated Lewis pairs (FLPs) reactivity towards small molecule activation has been widely concerned, the reports on the FLPs derived from aromatic amines are few. This paper describes a new facile route to the aromatic amine based FLPs starting from aromatic amine hydrochloride/tri(pentafluorophenyl)borane (BCF) as a combined active couple and hydridosilane as a source of the hydride. The reaction characteristics have been studied for a set of the stoichiometrical reactions. The difference between the alkyl amine hydrochloride/BCF and aromatic amine hydrochloride/BCF systems is that after reacting with the silanes the formed aromatic ammonium hydridoborates [Ar₂NH₂]⁺[HBCF]^- are not thermally stable and immediately release H₂ with formation of the corresponding amine and BCF. However, it is precisely because of this fact making this system applicable for a catalytic reaction-a novel efficient chlorination reaction of hydridosilanes, which could be considered as the first example of the nonmetal catalytic reactions of the type, with the aromatic amine hydrochloride as a function of the chlorination reagent and BCF as a catalytic activator. The chlorination products and reaction mechanism have been also explored in detail under different ratios of silanes and aromatic amine hydrochlorides. Remarkably, if required, the initial aromatic amine hydrochloride can be regenerated and recycled by a simple reaction with gaseous HCl. This makes the reaction rather attractive from the viewpoint of “green chemistry”.

Key words: frustrated Lewis pairs, tris(pentafluorophenyl)boron, aromatic ammonium chlorides, hydridosilanes, silane chlorides

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Tian Chong, Jiang Ya, Borzov Maxim, Nie Wanli. Studies on a Novel Type of B(C₆F₅)₃ and Aromatic Ammonium ChlorideSystem[J]. Acta Chim. Sinica, 2015, 73(11): 1203-1206.

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新型B(C₆F₅)₃/芳香胺盐酸盐体系的应用研究

Studies on a Novel Type of B(C₆F₅)₃ and Aromatic Ammonium ChlorideSystem

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新型B(C6F5)3/芳香胺盐酸盐体系的应用研究