131028-80-3

Upstream product

• 1198-55-6 o-chloranil 
• 1111-92-8 dimethylphosphinic acid chloride 
• 131028-76-7 2,2-Dimethyl-2-<1-(2,6-dioxo-1,3,5,7-tetramethyl-1,3,5,7,4λ⁵-tetraazaphosphaspiro<3.3>heptanyl)-tetrachlorphenylen-1,2-dioxy>-4,5-(tetrachlorbenzo)-1,3,2λ⁵-dioxaphospholen 

Relevant academic research and scientific papers

Reactions of Unsymmetrical λ5P - λ3P - Diphosphorus Compounds and of Diphosphines (λ3P - λ3P) with o-Quinones

The reaction of λ5P - λ3P diphosphorus compounds with o-quinones, e.g. tetrachloro-o-benzoquinone or 3,5-di-tert-butyl-o-benzoquinone, led not only to oxidative addition of the o-quinone to λ3P but also to insertion of a further molecule of o-quinone into the P-P bond (i.e. λ5P - λ3P diphosphorus compound and o-quinone reacted in a molar ratio 1:2).In the course of these oxidative addition and insertion reactions the o-quinones were converted into the corresponding hydroquinones (i.e. catechols).The products of these reactions were characterized by NMRand mass spectrometric methods, and by elemental analysis.The hydrolysis of the 1:2 addition products proceeded with cleavage of a P-O-C (hydroquinone) bond and formation of mononuclear products, involving λ4P and λ5P, respectively.A mechanism of this hydrolysis is proposed and has been elucidated by independent synthesis of some products.Diphosphines, i.e. symmetrical λ3P-λ3P diphosphorus compounds, were found to react with o-quinones in the same fashion in a molar ratio 1:3, i.e. with oxidative addition of the o-quinone to both λ3P atoms and insertion of tetrachloro-o-catechol into the P-P bond.