In 2018,Angewandte Chemie, International Edition included an article by Itoh, Taisuke; Kanzaki, Yamato; Shimizu, Yohei; Kanai, Motomu. Recommanded Product: (R)-1-{(R)-2-[Bis(4-methoxy-3,5-dimethylphenyl)phosphino]ferrocenyl}-ethylbis(2-methylphenyl)phosphine. The article was titled 《Copper(I)-catalyzed enantio- and diastereodivergent borylative coupling of styrenes and imines》. The information in the text is summarized as follows:
We report copper(I)-catalyzed enantio- and diastereodivergent borylative coupling of styrenes Ar1CH:CH2 with imines RCH:HP(S)Ar22 and B2pin2 to produce enantiomerically-enriched α,β-dibranched γ-boryl amine derivatives RCH(NHPSAr22)CHAr1CH2Bpin (3). Each of the four possible stereoisomers of the products, derived from the two contiguous stereocenters, was selectively accessible by choosing a proper chiral ligand for the copper catalyst. This method, which combines catalyst-controlled stereodivergency and constitutional divergency derived from the lynchpin motif (i.e., the C-B bond), offers a strategy for addressing the construction of mol. structural diversity concomitant with precise chirality control. The results came from multiple reactions, including the reaction of (R)-1-{(R)-2-[Bis(4-methoxy-3,5-dimethylphenyl)phosphino]ferrocenyl}-ethylbis(2-methylphenyl)phosphine(cas: 849924-49-8Recommanded Product: (R)-1-{(R)-2-[Bis(4-methoxy-3,5-dimethylphenyl)phosphino]ferrocenyl}-ethylbis(2-methylphenyl)phosphine)
(R)-1-{(R)-2-[Bis(4-methoxy-3,5-dimethylphenyl)phosphino]ferrocenyl}-ethylbis(2-methylphenyl)phosphine(cas: 849924-49-8) belongs to chiral phosphine ligands. Nucleophilic phosphine catalysis often involves the formation of Lewis adducts, namely phosphonium (di)enolate zwitterions, as reaction intermediates. Recommanded Product: (R)-1-{(R)-2-[Bis(4-methoxy-3,5-dimethylphenyl)phosphino]ferrocenyl}-ethylbis(2-methylphenyl)phosphine These intermediates are formed through nucleophilic attack of the phosphine catalysts at electron-poor nuclei (normally carbon atoms) and then proceed through several steps to form new chemical bonds.
Referemce:
Phosphine ligand,
Chiral phosphines in nucleophilic organocatalysis