503269-72-5

Upstream product

• 493-09-4 benzo-1,4-dioxane 
• 1079-66-9 chloro-diphenylphosphine 
• 52287-51-1 6-bromo-1,4-benzodioxane 

Downstream Products

• 503538-68-9 (S)-[(5,6),(5’,6’)-bis(ethylenedioxy)biphenyl-2,2’ diyl]bis(diphenylphosphine) 
• 503538-67-8 [2,3,2',3'-tetrahydro-5,5'-bi(1,4-benzodioxin)-6,6'-diyl]bis-(diphenylphosphane oxide) 
• 445380-61-0 (5-iodo-2,3-dihydro-1,4-benzodioxin-6-yl)diphenylphospane oxide 
• 445380-60-9 (2,3-dihydro-1,4-benzodioxin-6-yl)phospane oxide 

Relevant academic research and scientific papers

Synthesis of new chiral diphosphine ligand (BisbenzodioxanPhos) and its application in asymmetric catalytic hydrogenation

The new chiral diphosphine ligand [(5,6), (5′,6′)-bis(1,2-ethylenedioxy)biphenyl-2,2′-diyl]bis (diphenylphosphine) (BisbenzodioxanPhos) has been successfully prepared and used in ruthenium-catalyzed asymmetric hydrogenation of 2-(6′-methoxy-2′-naphthyl)propenoic acid and β-keto esters with high enantioselectivity (92.2% and up to 99.5% ee, respectively).

Synthesis of Axially Chiral 2,2′-Bisphosphobiarenes via a Nickel-Catalyzed Asymmetric Ullmann Coupling: General Access to Privileged Chiral Ligands without Optical Resolution

We report an asymmetric homocoupling of ortho-(iodo)arylphosphine oxides and ortho-(iodo)arylphosphonates resulting in highly enantioenriched axially chiral bisphosphine oxides and bisphosphonates. These products are readily converted to enantioenriched b

Novel diphosphines, their complexes with transisition metals and their use in asymmetric synthesis

The invention relates to novel diphosphines, in optically pure or racemic form, of formula (I): in which: R1 and R2 are a (C5-C7)cycloalkyl group, an optionally substituted phenyl group or a 5-membered heteroaryl group; and A is (CH2—CH2) or CF2. The invention further relates to the use of a compound of formula (I) as a ligand for the preparation of a metal complex useful as a chiral catalyst in asymmetric catalysis, and to the chiral metal catalysts comprising at least one ligand of formula (I).

Synthesis and Molecular Modeling Studies of SYNPHOS(R), a New, Efficient Diphosphane Ligand For Ruthenium-Catalyzed Asymmetric Hydrogenation

A new, optically active, atropisomeric diphosphane ligand, (2,3,2',3'-tetrahydro-5,5'-bi(1,4-benzodioxin)-6,6'-diyl)bis-(diphenylphosphane) (SYNPHOS(R)), has been synthesized, characterized, and used in ruthenium-catalyzed asymmetric hydrogenations. This new ligand has been compared with other atropisomeric diphosphanes (BINAP and MeO-BIPHEP) with respect to their dihedral angles calculated by molecular modeling and the enantioselectivity of their ruthenium-mediated hydrogenation reactions.

SYNPHOS: A new atropisomeric diphosphine ligand. From laboratory-scale synthesis to scale-up development

A new optically active diphosphine ligand, [(5,6),(5′,6′)-bis(ethylenedioxy)biphenyl.2,2′-diyl]bis (diphenylphosphine) (SYNPHOS) has been synthesized. Laboratory-scale synthesis and scale-up development of this ligand are described herein. This new atropisomeric diphosphine was also used in ruthenium-catalyzed asymmetric hydrogenation.