《Pd-Catalyzed asymmetric [5 + 2] cycloaddition of vinylethylene carbonates and cyclic imines: access to N-fused 1,3-oxazepines》 was written by Ahn, Hye-In; Park, Jong-Un; Xuan, Zi; Kim, Ju Hyun. SDS of cas: 210169-54-3 And the article was included in Organic & Biomolecular Chemistry in 2020. The article conveys some information:
A Pd-catalyzed asym. [5 + 2] cycloaddition reaction was developed for the synthesis of N-fused 1,3-oxazepines using vinylethylene carbonates and sulfamate-derived cyclic imines. Under mild reaction conditions, a series of optically active N-fused 1,3-oxazepines were synthesized in good yields (up to 89%) and enantioselectivities (up to 90 : 10 er), indicating this method as a straightforward approach to enantiomerically enriched 1,3-oxazepine derivatives The synthetic utility of the presented reaction was further demonstrated by the successful transformation of the resulting 1,3-oxazepines to useful polycyclic N-fused 1,3-oxazepanes. In the experiment, the researchers used (S)-5,5′-Bis(diphenylphosphino)-4,4′-bi-1,3-benzodioxole(cas: 210169-54-3SDS of cas: 210169-54-3)
(S)-5,5′-Bis(diphenylphosphino)-4,4′-bi-1,3-benzodioxole(cas: 210169-54-3) may be used for: rhodium-catalyzed asymmetric formal olefination or cycloaddition of 1,3-dicarbonyl compounds with 1,6-diynes or 1,6-enynes, stereoselective preparation of homoallylic alcohols via Ir-catalyzed stereoselective transfer hydrogenative crotylation of an allylic acetate with alcohols or aldehydesSDS of cas: 210169-54-3
Referemce:
Phosphine ligand,
Chiral phosphines in nucleophilic organocatalysis