Formation of a dicationic ruthenium benzyl complex by halide abstraction from a Grubbs-type second-generation benzylidene.
نویسندگان
چکیده
A ruthenium benzylidene complex with a neutral bidentate N-heterocyclic carbene was prepared and evaluated in ring-closing metathesis of diallyl substrates. Reaction with AgPF6 to generate a four-coordinate complex produced an unexpected dicationic ruthenium benzyl degradation product through nucleophilic attack of the NHC ligand on the benzylidene carbon.
منابع مشابه
Phase Tags in the Recycling of Homogeneous Grubbs Catalysts
Since they were first synthesized in 1992, the ruthenium catalyst named after Nobel Laureate R. H. Grubbs have become a useful tool in organic synthesis. Compared to conventional heterogeneous metathesis catalysts, Grubbs catalysts are more reactive, faster to initiate and better for reaction control. Grubbs catalysts have been employed in good effort both in academia and industry, the later in...
متن کاملRing closing metathesis in protic media by means of a neutral and polar ruthenium benzylidene complex.
The ring closing olefine metathesis in protic solvents using a new ruthenium benzylidene complex is described.
متن کاملBidentate N,O-prolinate ruthenium benzylidene catalyst highly active in RCM of disubstituted dienes.
The synthesis of a bidentate N,O-prolinate ruthenium benzylidene from commercially available starting materials and its activity in ring-closing metathesis of functionalized disubstituted dienes at 30 degrees C is disclosed.
متن کاملStability of Second Generation Grubbs Alkylidenes to Primary Amines: Formation of Novel Ruthenium-Amine Complexes
The stability of second generation Grubbs alkylidenes to primary amines relative to the first generation derivatives is investigated. For both Grubbs alkylidene derivatives, the tricyclohexylphosphine (PCy3) ligand is displaced by n-butylACHTUNGTRENNUNGamine and diethylenetriamine. However, while displacement of PCy3 in first generation Grubbs alkylidene derivatives results in decomposition of ...
متن کاملRuthenium nitronate complexes as tunable catalysts for olefin metathesis and other transformations.
Novel ruthenium(II) complexes were obtained as a result of a stoichiometric reaction of Grubbs' benzylidene second generation catalysts with 3-nitropropene. These stable complexes, formally ruthenaisoxazole N-oxide derivatives, display activity in both metathesis and non-metathetic processes such as cycloisomerisation, isomerisation and transfer hydrogenation.
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید
ثبت ناماگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید
ورودعنوان ژورنال:
- Dalton transactions
دوره 42 42 شماره
صفحات -
تاریخ انتشار 2013