S-(-)-6,6'-Bis(diphenylphosphino)-2,2',3,3'-tetrahydro-5,5'-bi-1,4-benzodioxin, min. 97% (S)-SYNPHOS

Technical Notes:
1.A chiral diphosphine ligand used in the highly-enantioselective hydrogenation of ketoesters, hydroxyketones, ketophosphonates and succinates.
2.A ligand used for the dynamic kinetic resolution of at,ß- unsaturated lactones via asymmetric copper catalyzed conjugate reduction.
3.Used in the intramolecular Heck reaction for the synthesis of diterpenoids.
4.Used in asymmetric P auson-Khand reaction.
5.Used in asymmetric iminonitroso Diels-Alder re action.
6.Palladium catalyzed asymmetric hydrogenation of N-tosyl ketimines
References:
1.Tetrahedron L ett., 2003, 44, 823.
2.Angew. ( hem. Int. Ed., 2005, 44, 61 77.
3.J. Org. Chem., 2010, 75, 1 90.
4.Adv. Synth. Catal., 2007, 349, 1 999.
5.Tetrahedron L ett., 2009, 50, 5879.
6.J. Org. Chem., 2007, 72, 3729.