Aida, Yukimasa published the artcileRhodium-Catalyzed Asymmetric [2 + 2 + 2] Cycloaddition of α,ω-Diynes with Unsymmetrical 1,2-Disubstituted Alkenes, Category: dioxole, the publication is Organic Letters (2016), 18(11), 2672-2675, database is CAplus and MEDLINE.
It has been established that a cationic rhodium(I)/axially chiral biaryl bisphosphine complex catalyzes the asym. [2 + 2 + 2] cycloaddition of α,ω-diynes with electron-rich and unstrained unsym. 1,2-disubstituted alkenes to give chiral multicyclic compounds with good yields and ee values. Interestingly, enantioselectivity highly depends on the structures of α,ω-diynes used presumably due to the presence of two distinct reaction pathways.
Organic Letters 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, Category: dioxole.
Referemce:
https://en.wikipedia.org/wiki/1,3-Benzodioxole,
Dioxole | C3H4O2 – PubChem