𝔖 Bobbio Scriptorium
✦   LIBER   ✦

Activation of reducing agents. Sodium hydride containing complex reducing agents 23. Symmetrical coupling of nitrogen-containing heterocyclic halides

✍ Scribed by R. Vanderesse; M. Lourak; Y. Fort; P. Caubere

Publisher
Elsevier Science
Year
1986
Tongue
French
Weight
183 KB
Volume
27
Category
Article
ISSN
0040-4039

No coin nor oath required. For personal study only.

✦ Synopsis

The preparation of NiCRA (NaH-B:ONa-Ni(OAc) ) in the oresence of PPh3 leads to a reagent (termed NiCRA-PPh3) which is shown $ o be one of the most efflclent Ni containing reagents reported so far for the homocoupling of heteroaromatic halides. Symmetrical couDling of aryl halides may be performed with either preformed' or in &ZU generated' transition metal comolexes. Whatever their origin, these classical reagents easily counle aryl iodides, less easily aryl bromides or triflates, and scarcely at all aryl chlorides (see for example ref.3).

in the cbntrarv, we have alreadv 4 sho~:n that liyand modified NiCRA, i.e. il? ntiitu

πŸ“œ SIMILAR VOLUMES

Activation of reducing agents. Sodium hy
Activation of reducing agents. Sodium hydride containing complex reducing agents 22. New coupling reaction with β€œnickel doped” complex reducing agent.
✍ RΓ©gis Vanderesse; Yves Fort; Sandrine Becker; Paul Caubere πŸ“‚ Article πŸ“… 1986 πŸ› Elsevier Science 🌐 French βš– 178 KB

Vinyl halides can be coupled by NiCRA-bpy in THF or hexane. Interestingly simply changing the solvent changes the nature of the product : diene in THF, and enyne in hexane. Metal promoted homocoupling of vinyl halides continues to be actively studied on account of its wide range of synthetic applic

Activation of reducing agents. Sodium hy
Activation of reducing agents. Sodium hydride containing β€œComplex reducing agents” V Some properties of FeCl3 complex reducing agents (FeCRA)
✍ J.J Brunet; P Caubere πŸ“‚ Article πŸ“… 1977 πŸ› Elsevier Science 🌐 French βš– 257 KB

Since a few years, considerable attention has been devoted to the study of reducing agents which consist of mixtures of transition metal salts and metal hydrides\*. When we started our works on this subject, sodium hydride had scarcely been used for the preparation of this kind of reagents. In previ

Activation of reducing agents. Sodium hy
Activation of reducing agents. Sodium hydride containing β€œComplex reducing agents” VI Some new complex reducing agents and some new applications
✍ B Loubinoux; R Vanderesse; P Caubere πŸ“‚ Article πŸ“… 1977 πŸ› Elsevier Science 🌐 French βš– 245 KB

Our previous publications showed that Complex Reducing Agents (CM) NaH-RONa-MXn (where RONa was a sodium alcoholate and MXn Ni, Co ~37 salts) are new cheap, easily prepared