Ishida, Naoki published the artcileConstruction of indole skeletons by sequential actions of sunlight and rhodium on α-aminoacetophenones, Computed Properties of 503538-69-0, the publication is Chemistry Letters (2013), 42(9), 1076-1078, database is CAplus.
Indole skeletons were constructed from 2-(N-aryl-N-methylamino)acetophenone derivatives and a sequential action of solar radiation (sunlight) and a rhodium catalyst [bis[(1,2,5,6-η)-1,5-cyclooctadiene]di-μ-(hydroxy)dirhodium]. This method presents an example of the direct use of sunlight in organic synthesis. The synthesis of the target compounds was achieved using 2-(methylphenylamino)-1-(phenyl)ethanone (I) and related substances as starting materials. The target compounds thus formed included 1-methyl-3-phenyl-1H-indole (II) and related compounds 1,1′-[(4R)-2,2,2′,2′-Tetrafluoro[4,4′-bi-1,3-benzodioxole]-5,5′-diyl]bis[1,1-diphenylphosphine] [(R)-difluorphos] was used for an enantioselective synthesis variant toward the formation of chiral 2,3-dihydro-1-methyl-3-phenyl-1H-indol-3-ol and chiral 2,3-dihydro-3-hydroxy-1-methyl-3-phenyl-1H-indole-5-carboxylic acid Me ester.
Chemistry 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, Computed Properties of 503538-69-0.
Referemce:
https://en.wikipedia.org/wiki/1,3-Benzodioxole,
Dioxole | C3H4O2 – PubChem