Chen, Zhiwei; Lin, Huaxin; Han, Jian; Fang, Dongmei; Wang, Min; Liao, Jian published an article in 2021. The article was titled 《Enantioselective Copper-Catalyzed Electrophilic Sulfenylation of Cyclic Imino Esters》, and you may find the article in Organic Letters.Reference of (S)-5,5′-Bis(diphenylphosphino)-4,4′-bi-1,3-benzodioxole The information in the text is summarized as follows:
An enantioselective sulfenylation of cyclic imino esters with the efficient and versatile sulfenylation reagent S-alkyl 4-methylbenzenesulfonothioates was reported. By utilizing the Cu/tBu-Phosferrox catalytic system, an diverse S-alkyl groups into the cyclic imino esters under mild conditions in good yields and with excellent enantioselectivities was reported. Remarkably, this method demonstrates a high tolerance of diverse functional groups and proves to be applicable in the late-stage functionalization of pharmaceuticals. The experimental part of the paper was very detailed, including the reaction process of (S)-5,5′-Bis(diphenylphosphino)-4,4′-bi-1,3-benzodioxole(cas: 210169-54-3Reference of (S)-5,5′-Bis(diphenylphosphino)-4,4′-bi-1,3-benzodioxole)
(S)-5,5′-Bis(diphenylphosphino)-4,4′-bi-1,3-benzodioxole(cas: 210169-54-3) is a chelating ligand used to prepare coordination complex catalysts, such as its use in Pd catalysts for the enantioselective synthesis of spiro- or benzofused hetereocycles with exocyclic olefins via enantioselective intramolecular dearomative Heck reaction of indoles, benzofurans, pyrroles and furans.Reference of (S)-5,5′-Bis(diphenylphosphino)-4,4′-bi-1,3-benzodioxole
Referemce:
Phosphine ligand,
Chiral phosphines in nucleophilic organocatalysis