55441-96-8

Upstream product

• 55441-95-7 2,2’-[1,1'-binaphtalene-2,2’-diyl bis(oxy)]diethanol 
• 98-59-9 p-toluenesulfonyl chloride 
• 602-09-5 1,1'-bi-2-naphthol 
• 154780-34-4 2,2'-bis(ethoxycarbonylmethoxy)-1,1'-binaphthalene 
• 75685-01-7 2,2'-dimethoxy-1,1'-binaphthyl 

Downstream Products

• 159992-79-7 4,7-diphenylbenzo{e}dinaphtho{2,1-k:1',2'-m}-1,10-dioxa-4,7-diphosphacyclotetradeca-5,11,13-triene 
• 244301-10-8 2,2'-bis(2-diphenylphosphinoethoxy)-1,1'-binaphthalene 

Relevant academic research and scientific papers

Synthesis and application of macrocyclic binaphthyl ligands with extended chiral bias

Two macrocyclic and one non-cyclic chiral diphosphine ligand containing a 2,2'-bridged binaphthyl unit were synthesized in six steps from (R)-2,2'- dimethoxy-1,1'-binaphthyl in overall yields of 25 and 17%, respectively. The new ligands showed asymmetric inductions of up to 98% e.e. if used in palladium catalyzed allylic alkylation reactions.

Synthesis and NMR spectroscopic investigation of a macrocyclic diphosphine ligand and its nickel(II) and palladium(II) complexes

The preparation of a macrocyclic diphosphine ligand 5 incorporating a binaphthyl unit and its Ni(II) and Pd(II) complexes, 6 and 7, is decribed. A complete assignment of 1H,- 13C-, and 31P-NMR data on the basis of 2D NMR spectroscopy (1H, 1H-, 13C, 1H-, 31P, 1H-, 31P, 13C-COSY) was possible for 5, and also - in part - for 6 and 7.