Regioselective Diboration and Silaboration of Allenes Catalyzed by Au Nanoparticles,ACS Catalysis

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Regioselective Diboration and Silaboration of Allenes Catalyzed by Au Nanoparticles
ACS Catalysis ( IF 11.3 ) Pub Date : 2018-01-17 00:00:00 , DOI: 10.1021/acscatal.7b04084
Marios Kidonakis ₁ , Manolis Stratakis ₁

Affiliation

Under catalysis by commercially available supported Au nanoparticles on TiO₂ (1 mol %), terminal allenes undergo diboration and silaboration exclusively on the terminal double bond, in high yields and stereoselectivity. In silaboration, the boron moiety (Bpin) is attached on the terminal carbon and the silyl group on the sp-C, a regioselectivity pattern that is unusual. No ligands or additives are required, while the catalyst is recyclable and reusable. The selectivity is rationalized in terms of a π-allyl type or an η-1 complex intermediate with an apparent allylic carbocationic character, as revealed through the use of cyclopropyl allenes as sensitive probes.

中文翻译：

金纳米粒子催化的丙二烯的区域选择性合成和硅烷化

在市售的负载型Au纳米颗粒在TiO ₂（1 mol％）的催化下，末端异戊烯仅在末端双键上进行硼化和硅烷化，从而获得高收率和立体选择性。在硅化过程中，硼部分（Bpin）连接在sp-C的末端碳和甲硅烷基上，这是不常见的区域选择性模式。不需要配体或添加剂，而催化剂是可回收的和可重复使用的。如通过使用环丙基烯丙基作为敏感探针所揭示的，根据具有明显的烯丙基碳阳离子特性的π-烯丙基类型或η-1配合物中间体合理化了选择性。

更新日期：2018-01-17

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