Li, Sifeng published the artcilePalladium/Zinc Co-Catalyzed syn-Stereoselectively Asymmetric Ring-Opening Reaction of Oxabenzonorbornadienes with Phenols, Computed Properties of 503538-69-0, the publication is Chemistry – A European Journal (2015), 21(25), 9003-9007, database is CAplus and MEDLINE.
A new palladium/zinc co-catalyst system associated with chiral (R)-Difluorphos for asym. ring-opening reaction of oxabenzonorbornadienes with phenols is reported. This catalyst system allows the formation of cis-2-aryloxy-1,2-dihydronaphthalen-1-ol I (Ar = Ph, 4-FC6H4, 4-ClC6H4, 4-BrC6H4, etc.) and II (R = 5,8-(OCH3)2, 5,8-(CH3)2, 6,7-Br2, 6,7-OCH2O, 6,7-(OCH3)2) products in good yields (up to 95 % yield) with excellent enantioselectivities (up to 99 % ee). The cis-configuration of the product has been confirmed by X-ray crystal structure anal. To the best of our knowledge, it represents the first example in ring-opening reactions of bicycloalkenes with heteronucleophiles in a syn-stereoselective manner.
Chemistry – A European Journal published new progress about 503538-69-0. 503538-69-0 belongs to dioxole, auxiliary class (Atropisomeric Bisphosphine Ligands, name is (R)-5,5′-Bis(diphenylphosphino)-2,2,2′,2′-tetrafluoro-4,4′-bi-1,3-benzodioxole, and the molecular formula is C38H24F4O4P2, Computed Properties of 503538-69-0.
Referemce:
https://en.wikipedia.org/wiki/1,3-Benzodioxole,
Dioxole | C3H4O2 – PubChem