Gerten, Anthony L. published the artcileEnantioselective dearomative [3 + 2] cycloadditions of indoles with azomethine ylides derived from alanine imino esters, Related Products of dioxole, the publication is Organic Chemistry Frontiers (2016), 3(3), 339-343, database is CAplus.
Catalytic, enantioselective [3 + 2] cycloadditions of azomethine ylides derived from alanine imino esters with 3-nitroindoles were reported. The dearomative cycloaddition reactions occurred in the presence of a catalyst generated in situ from Cu(OTf)2 and (R)-Difluorphos to form exo’-pyrroloindoline cycloadducts and established four contiguous stereogenic centers, two of which were fully substituted. The exo’-pyrroloindoline products were formed in moderate-to-good yields (39-85%) with high diastereoselectivities (up to 98 : 1 : 1 dr) and enantioselectivities (up to 96% ee).
Organic Chemistry Frontiers 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, Related Products of dioxole.
Referemce:
https://en.wikipedia.org/wiki/1,3-Benzodioxole,
Dioxole | C3H4O2 – PubChem